47640797 has 4 divisors (see below), whose sum is σ = 49712160. Its totient is φ = 45569436.

The previous prime is 47640773. The next prime is 47640821. The reversal of 47640797 is 79704674.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (47640773) and next prime (47640821).

It is a cyclic number.

It is not a de Polignac number, because 47640797 - 2²² = 43446493 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 (47640737) 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, 1035647 + ... + 1035692.

It is an arithmetic number, because the mean of its divisors is an integer number (12428040).

Almost surely, 2^47640797 is an apocalyptic number.

It is an amenable number.

47640797 is a deficient number, since it is larger than the sum of its proper divisors (2071363).

47640797 is a wasteful number, since it uses less digits than its factorization.

47640797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2071362.

The product of its (nonzero) digits is 296352, while the sum is 44.

The square root of 47640797 is about 6902.2313058894. The cubic root of 47640797 is about 362.5152989183.

The spelling of 47640797 in words is "forty-seven million, six hundred forty thousand, seven hundred ninety-seven".