64151987 has 4 divisors (see below), whose sum is σ = 64188216. Its totient is φ = 64115760.

The previous prime is 64151977. The next prime is 64151993. The reversal of 64151987 is 78915146.

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 64151987 - 2²² = 59957683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64151917) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15314 + ... + 19047.

It is an arithmetic number, because the mean of its divisors is an integer number (16047054).

Almost surely, 2^64151987 is an apocalyptic number.

64151987 is a deficient number, since it is larger than the sum of its proper divisors (36229).

64151987 is a wasteful number, since it uses less digits than its factorization.

64151987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36228.

The product of its digits is 60480, while the sum is 41.

The square root of 64151987 is about 8009.4935545264. The cubic root of 64151987 is about 400.3163892619.

The spelling of 64151987 in words is "sixty-four million, one hundred fifty-one thousand, nine hundred eighty-seven".