47449397 has 4 divisors (see below), whose sum is σ = 50240556. Its totient is φ = 44658240.

The previous prime is 47449373. The next prime is 47449421. The reversal of 47449397 is 79394474.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79394474 = 2 ⋅39697237.

It is an interprime number because it is at equal distance from previous prime (47449373) and next prime (47449421).

It can be written as a sum of positive squares in 2 ways, for example, as 29691601 + 17757796 = 5449^2 + 4214^2 .

It is a cyclic number.

It is not a de Polignac number, because 47449397 - 2¹² = 47445301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47449097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1395554 + ... + 1395587.

It is an arithmetic number, because the mean of its divisors is an integer number (12560139).

Almost surely, 2^47449397 is an apocalyptic number.

It is an amenable number.

47449397 is a deficient number, since it is larger than the sum of its proper divisors (2791159).

47449397 is a wasteful number, since it uses less digits than its factorization.

47449397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2791158.

The product of its digits is 762048, while the sum is 47.

The square root of 47449397 is about 6888.3522703184. The cubic root of 47449397 is about 362.0291710566.

It can be divided in two parts, 4744 and 9397, that added together give a palindrome (14141).

The spelling of 47449397 in words is "forty-seven million, four hundred forty-nine thousand, three hundred ninety-seven".