390501887987 has 2 divisors, whose sum is σ = 390501887988. Its totient is φ = 390501887986.

The previous prime is 390501887977. The next prime is 390501888001. The reversal of 390501887987 is 789788105093.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 390501887987 - 2¹⁰ = 390501886963 is a prime.

It is a super-2 number, since 2×390501887987² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (390501887927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195250943993 + 195250943994.

It is an arithmetic number, because the mean of its divisors is an integer number (195250943994).

Almost surely, 2^390501887987 is an apocalyptic number.

390501887987 is a deficient number, since it is larger than the sum of its proper divisors (1).

390501887987 is an equidigital number, since it uses as much as digits as its factorization.

390501887987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30481920, while the sum is 65.

The spelling of 390501887987 in words is "three hundred ninety billion, five hundred one million, eight hundred eighty-seven thousand, nine hundred eighty-seven".