64294813 has 4 divisors (see below), whose sum is σ = 70139808. Its totient is φ = 58449820.

The previous prime is 64294807. The next prime is 64294819. The reversal of 64294813 is 31849246.

It is the 3274-th star number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (64294807) and next prime (64294819).

It is a de Polignac number, because none of the positive numbers 2^k-64294813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64294819) 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, 2922481 + ... + 2922502.

It is an arithmetic number, because the mean of its divisors is an integer number (17534952).

Almost surely, 2^64294813 is an apocalyptic number.

It is an amenable number.

64294813 is a deficient number, since it is larger than the sum of its proper divisors (5844995).

64294813 is a wasteful number, since it uses less digits than its factorization.

64294813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5844994.

The product of its digits is 41472, while the sum is 37.

The square root of 64294813 is about 8018.4046418225. The cubic root of 64294813 is about 400.6132530712.

The spelling of 64294813 in words is "sixty-four million, two hundred ninety-four thousand, eight hundred thirteen".