7912919522 has 4 divisors (see below), whose sum is σ = 11869379286. Its totient is φ = 3956459760.

The previous prime is 7912919507. The next prime is 7912919527. The reversal of 7912919522 is 2259192197.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7368677281 + 544242241 = 85841^2 + 23329^2 .

It is a super-2 number, since 2×7912919522² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7912919527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1978229879 + ... + 1978229882.

Almost surely, 2^7912919522 is an apocalyptic number.

7912919522 is a deficient number, since it is larger than the sum of its proper divisors (3956459764).

7912919522 is a wasteful number, since it uses less digits than its factorization.

7912919522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3956459763.

The product of its digits is 204120, while the sum is 47.

The square root of 7912919522 is about 88954.5924727892. The cubic root of 7912919522 is about 1992.7168032170.

The spelling of 7912919522 in words is "seven billion, nine hundred twelve million, nine hundred nineteen thousand, five hundred twenty-two".