39970492391 has 2 divisors, whose sum is σ = 39970492392. Its totient is φ = 39970492390.

The previous prime is 39970492369. The next prime is 39970492411. The reversal of 39970492391 is 19329407993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39970492391 - 2¹⁰ = 39970491367 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39970492691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19985246195 + 19985246196.

It is an arithmetic number, because the mean of its divisors is an integer number (19985246196).

Almost surely, 2^39970492391 is an apocalyptic number.

39970492391 is a deficient number, since it is larger than the sum of its proper divisors (1).

39970492391 is an equidigital number, since it uses as much as digits as its factorization.

39970492391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3306744, while the sum is 56.

The spelling of 39970492391 in words is "thirty-nine billion, nine hundred seventy million, four hundred ninety-two thousand, three hundred ninety-one".