15790997 has 8 divisors (see below), whose sum is σ = 16346880. Its totient is φ = 15238080.

The previous prime is 15790991. The next prime is 15791023. The reversal of 15790997 is 79909751.

It is a happy number.

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 15790997 - 2⁸ = 15790741 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 (15790991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17954 + ... + 18812.

It is an arithmetic number, because the mean of its divisors is an integer number (2043360).

Almost surely, 2^15790997 is an apocalyptic number.

It is an amenable number.

15790997 is a deficient number, since it is larger than the sum of its proper divisors (555883).

15790997 is an equidigital number, since it uses as much as digits as its factorization.

15790997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1483.

The product of its (nonzero) digits is 178605, while the sum is 47.

The square root of 15790997 is about 3973.7887462723. The cubic root of 15790997 is about 250.8822005602.

The spelling of 15790997 in words is "fifteen million, seven hundred ninety thousand, nine hundred ninety-seven".