390867220787 has 2 divisors, whose sum is σ = 390867220788. Its totient is φ = 390867220786.

The previous prime is 390867220771. The next prime is 390867220801. The reversal of 390867220787 is 787022768093.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 390867220787 - 2⁴ = 390867220771 is a prime.

It is not a weakly prime, because it can be changed into another prime (390867220687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195433610393 + 195433610394.

It is an arithmetic number, because the mean of its divisors is an integer number (195433610394).

Almost surely, 2^390867220787 is an apocalyptic number.

390867220787 is a deficient number, since it is larger than the sum of its proper divisors (1).

390867220787 is an equidigital number, since it uses as much as digits as its factorization.

390867220787 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14224896, while the sum is 59.

The spelling of 390867220787 in words is "three hundred ninety billion, eight hundred sixty-seven million, two hundred twenty thousand, seven hundred eighty-seven".