7990023121 has 8 divisors (see below), whose sum is σ = 8033256000. Its totient is φ = 7946817648.

The previous prime is 7990023059. The next prime is 7990023157. The reversal of 7990023121 is 1213200997.

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 7990023121 - 2¹¹ = 7990021073 is a prime.

It is a super-2 number, since 2×7990023121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7990053121) 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, 883380 + ... + 892378.

It is an arithmetic number, because the mean of its divisors is an integer number (1004157000).

Almost surely, 2^7990023121 is an apocalyptic number.

It is an amenable number.

7990023121 is a deficient number, since it is larger than the sum of its proper divisors (43232879).

7990023121 is a wasteful number, since it uses less digits than its factorization.

7990023121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13703.

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

The square root of 7990023121 is about 89386.9292514291. The cubic root of 7990023121 is about 1999.1682475586.

The spelling of 7990023121 in words is "seven billion, nine hundred ninety million, twenty-three thousand, one hundred twenty-one".