39977238997 has 2 divisors, whose sum is σ = 39977238998. Its totient is φ = 39977238996.

The previous prime is 39977238941. The next prime is 39977239039. The reversal of 39977238997 is 79983277993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35853801201 + 4123437796 = 189351^2 + 64214^2 .

It is a cyclic number.

It is not a de Polignac number, because 39977238997 - 2¹⁵ = 39977206229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39977238397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19988619498 + 19988619499.

It is an arithmetic number, because the mean of its divisors is an integer number (19988619499).

Almost surely, 2^39977238997 is an apocalyptic number.

It is an amenable number.

39977238997 is a deficient number, since it is larger than the sum of its proper divisors (1).

39977238997 is an equidigital number, since it uses as much as digits as its factorization.

39977238997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324060912, while the sum is 73.

The spelling of 39977238997 in words is "thirty-nine billion, nine hundred seventy-seven million, two hundred thirty-eight thousand, nine hundred ninety-seven".