45312187 has 2 divisors, whose sum is σ = 45312188. Its totient is φ = 45312186.

The previous prime is 45312149. The next prime is 45312199. The reversal of 45312187 is 78121354.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-45312187 is a prime.

It is not a weakly prime, because it can be changed into another prime (45352187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22656093 + 22656094.

It is an arithmetic number, because the mean of its divisors is an integer number (22656094).

Almost surely, 2^45312187 is an apocalyptic number.

45312187 is a deficient number, since it is larger than the sum of its proper divisors (1).

45312187 is an equidigital number, since it uses as much as digits as its factorization.

45312187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6720, while the sum is 31.

The square root of 45312187 is about 6731.4327598216. The cubic root of 45312187 is about 356.5099659074.

The spelling of 45312187 in words is "forty-five million, three hundred twelve thousand, one hundred eighty-seven".