64147894 has 4 divisors (see below), whose sum is σ = 96221844. Its totient is φ = 32073946.

The previous prime is 64147883. The next prime is 64147991. The reversal of 64147894 is 49874146.

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

It is a super-2 number, since 2×64147894² = 8229904609270472, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64147894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16036972 + ... + 16036975.

It is an arithmetic number, because the mean of its divisors is an integer number (24055461).

Almost surely, 2^64147894 is an apocalyptic number.

64147894 is a deficient number, since it is larger than the sum of its proper divisors (32073950).

64147894 is a wasteful number, since it uses less digits than its factorization.

64147894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32073949.

The product of its digits is 193536, while the sum is 43.

The square root of 64147894 is about 8009.2380411622. The cubic root of 64147894 is about 400.3078754709.

The spelling of 64147894 in words is "sixty-four million, one hundred forty-seven thousand, eight hundred ninety-four".