39920236087 has 2 divisors, whose sum is σ = 39920236088. Its totient is φ = 39920236086.

The previous prime is 39920236061. The next prime is 39920236093. The reversal of 39920236087 is 78063202993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 39920236087 - 2²⁷ = 39786018359 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39920236087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39920246087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19960118043 + 19960118044.

It is an arithmetic number, because the mean of its divisors is an integer number (19960118044).

Almost surely, 2^39920236087 is an apocalyptic number.

39920236087 is a deficient number, since it is larger than the sum of its proper divisors (1).

39920236087 is an equidigital number, since it uses as much as digits as its factorization.

39920236087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 49.

The spelling of 39920236087 in words is "thirty-nine billion, nine hundred twenty million, two hundred thirty-six thousand, eighty-seven".