64738947 has 48 divisors (see below), whose sum is σ = 113890560. Its totient is φ = 32332608.

The previous prime is 64738931. The next prime is 64738957. The reversal of 64738947 is 74983746.

It is a happy number.

It is not a de Polignac number, because 64738947 - 2⁴ = 64738931 is a prime.

It is a super-2 number, since 2×64738947² = 8382262517337618, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64738896 and 64738905.

It is not an unprimeable number, because it can be changed into a prime (64738957) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 35418 + ... + 37200.

It is an arithmetic number, because the mean of its divisors is an integer number (2372720).

Almost surely, 2^64738947 is an apocalyptic number.

64738947 is a deficient number, since it is larger than the sum of its proper divisors (49151613).

64738947 is a wasteful number, since it uses less digits than its factorization.

64738947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832 (or 1825 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 48.

The square root of 64738947 is about 8046.0516404010. The cubic root of 64738947 is about 401.5335856898.

The spelling of 64738947 in words is "sixty-four million, seven hundred thirty-eight thousand, nine hundred forty-seven".