47320645 has 8 divisors (see below), whose sum is σ = 56939256. Its totient is φ = 37753536.

The previous prime is 47320633. The next prime is 47320657. The reversal of 47320645 is 54602374.

It is an interprime number because it is at equal distance from previous prime (47320633) and next prime (47320657).

It can be written as a sum of positive squares in 4 ways, for example, as 4 + 47320641 = 2^2 + 6879^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47320645 - 2¹⁹ = 46796357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10822 + ... + 14551.

It is an arithmetic number, because the mean of its divisors is an integer number (7117407).

Almost surely, 2^47320645 is an apocalyptic number.

It is an amenable number.

47320645 is a deficient number, since it is larger than the sum of its proper divisors (9618611).

47320645 is a wasteful number, since it uses less digits than its factorization.

47320645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25751.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 47320645 is about 6879.0002907399. Note that the first 3 decimals coincide. The cubic root of 47320645 is about 361.7014239804.

The spelling of 47320645 in words is "forty-seven million, three hundred twenty thousand, six hundred forty-five".