39976642697 has 2 divisors, whose sum is σ = 39976642698. Its totient is φ = 39976642696.

The previous prime is 39976642679. The next prime is 39976642799. The reversal of 39976642697 is 79624667993.

It is a happy number.

Together with previous prime (39976642679) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30255471481 + 9721171216 = 173941^2 + 98596^2 .

It is a cyclic number.

It is not a de Polignac number, because 39976642697 - 2⁶ = 39976642633 is a prime.

It is a super-2 number, since 2×39976642697² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (39976645697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19988321348 + 19988321349.

It is an arithmetic number, because the mean of its divisors is an integer number (19988321349).

Almost surely, 2^39976642697 is an apocalyptic number.

It is an amenable number.

39976642697 is a deficient number, since it is larger than the sum of its proper divisors (1).

39976642697 is an equidigital number, since it uses as much as digits as its factorization.

39976642697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 185177664, while the sum is 68.

The spelling of 39976642697 in words is "thirty-nine billion, nine hundred seventy-six million, six hundred forty-two thousand, six hundred ninety-seven".