230906402987 has 4 divisors (see below), whose sum is σ = 248668434000. Its totient is φ = 213144371976.

The previous prime is 230906402983. The next prime is 230906402999. The reversal of 230906402987 is 789204609032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 230906402987 - 2² = 230906402983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (230906402983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8881015487 + ... + 8881015512.

It is an arithmetic number, because the mean of its divisors is an integer number (62167108500).

Almost surely, 2^230906402987 is an apocalyptic number.

230906402987 is a deficient number, since it is larger than the sum of its proper divisors (17762031013).

230906402987 is a wasteful number, since it uses less digits than its factorization.

230906402987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17762031012.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 230906402987 in words is "two hundred thirty billion, nine hundred six million, four hundred two thousand, nine hundred eighty-seven".