47990197 has 4 divisors (see below), whose sum is σ = 48013420. Its totient is φ = 47966976.

The previous prime is 47990191. The next prime is 47990203. The reversal of 47990197 is 79109974.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (47990191) and next prime (47990203).

It can be written as a sum of positive squares in 2 ways, for example, as 20016676 + 27973521 = 4474^2 + 5289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47990197 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 (47990191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8172 + ... + 12757.

It is an arithmetic number, because the mean of its divisors is an integer number (12003355).

Almost surely, 2^47990197 is an apocalyptic number.

It is an amenable number.

47990197 is a deficient number, since it is larger than the sum of its proper divisors (23223).

47990197 is a wasteful number, since it uses less digits than its factorization.

47990197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23222.

The product of its (nonzero) digits is 142884, while the sum is 46.

The square root of 47990197 is about 6927.4957235642. The cubic root of 47990197 is about 363.3993762804.

The spelling of 47990197 in words is "forty-seven million, nine hundred ninety thousand, one hundred ninety-seven".