7919726397 has 16 divisors (see below), whose sum is σ = 11533084992. Its totient is φ = 4794216320.

The previous prime is 7919726387. The next prime is 7919726467. The reversal of 7919726397 is 7936279197.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 7919726397 - 2¹⁴ = 7919710013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 7919726397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7919726317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111738 + ... + 168299.

It is an arithmetic number, because the mean of its divisors is an integer number (720817812).

Almost surely, 2^7919726397 is an apocalyptic number.

It is an amenable number.

7919726397 is a deficient number, since it is larger than the sum of its proper divisors (3613358595).

7919726397 is a wasteful number, since it uses less digits than its factorization.

7919726397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280908.

The product of its digits is 9001692, while the sum is 60.

The square root of 7919726397 is about 88992.8446393304. The cubic root of 7919726397 is about 1993.2880330312.

The spelling of 7919726397 in words is "seven billion, nine hundred nineteen million, seven hundred twenty-six thousand, three hundred ninety-seven".