872130997 has 4 divisors (see below), whose sum is σ = 910049760. Its totient is φ = 834212236.

The previous prime is 872130911. The next prime is 872131003. The reversal of 872130997 is 799031278.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 799031278 = 2 ⋅399515639.

It is a cyclic number.

It is not a de Polignac number, because 872130997 - 2⁷ = 872130869 is a prime.

It is a super-2 number, since 2×872130997² = 1521224951856428018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (872130397) 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, 18959347 + ... + 18959392.

It is an arithmetic number, because the mean of its divisors is an integer number (227512440).

Almost surely, 2^872130997 is an apocalyptic number.

It is an amenable number.

872130997 is a deficient number, since it is larger than the sum of its proper divisors (37918763).

872130997 is a wasteful number, since it uses less digits than its factorization.

872130997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37918762.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 872130997 is about 29531.8640962605. The cubic root of 872130997 is about 955.4190743184.

The spelling of 872130997 in words is "eight hundred seventy-two million, one hundred thirty thousand, nine hundred ninety-seven".