7991232001 has 16 divisors (see below), whose sum is σ = 8130659328. Its totient is φ = 7853414400.

The previous prime is 7991231957. The next prime is 7991232013. The reversal of 7991232001 is 1002321997.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7991232001 - 2⁷ = 7991231873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7991232061) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6930241 + ... + 6931393.

It is an arithmetic number, because the mean of its divisors is an integer number (508166208).

Almost surely, 2^7991232001 is an apocalyptic number.

It is an amenable number.

7991232001 is a deficient number, since it is larger than the sum of its proper divisors (139427327).

7991232001 is a wasteful number, since it uses less digits than its factorization.

7991232001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1752.

The product of its (nonzero) digits is 6804, while the sum is 34.

The square root of 7991232001 is about 89393.6910581502. The cubic root of 7991232001 is about 1999.2690663172.

Adding to 7991232001 its reverse (1002321997), we get a palindrome (8993553998).

The spelling of 7991232001 in words is "seven billion, nine hundred ninety-one million, two hundred thirty-two thousand, one".