920167987 has 2 divisors, whose sum is σ = 920167988. Its totient is φ = 920167986.

The previous prime is 920167979. The next prime is 920168003. The reversal of 920167987 is 789761029.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 920167987 - 2³ = 920167979 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 920167987.

It is not a weakly prime, because it can be changed into another prime (920167957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460083993 + 460083994.

It is an arithmetic number, because the mean of its divisors is an integer number (460083994).

Almost surely, 2^920167987 is an apocalyptic number.

920167987 is a deficient number, since it is larger than the sum of its proper divisors (1).

920167987 is an equidigital number, since it uses as much as digits as its factorization.

920167987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 49.

The square root of 920167987 is about 30334.2708334979. The cubic root of 920167987 is about 972.6480190942.

The spelling of 920167987 in words is "nine hundred twenty million, one hundred sixty-seven thousand, nine hundred eighty-seven".