39997000051 has 2 divisors, whose sum is σ = 39997000052. Its totient is φ = 39997000050.

The previous prime is 39997000049. The next prime is 39997000097. The reversal of 39997000051 is 15000079993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 39997000051 - 2¹ = 39997000049 is a prime.

Together with 39997000049, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 39996999971 and 39997000007.

It is not a weakly prime, because it can be changed into another prime (39997000151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19998500025 + 19998500026.

It is an arithmetic number, because the mean of its divisors is an integer number (19998500026).

Almost surely, 2^39997000051 is an apocalyptic number.

39997000051 is a deficient number, since it is larger than the sum of its proper divisors (1).

39997000051 is an equidigital number, since it uses as much as digits as its factorization.

39997000051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 76545, while the sum is 43.

The spelling of 39997000051 in words is "thirty-nine billion, nine hundred ninety-seven million, fifty-one", and thus it is an aban number.