64349737 has 4 divisors (see below), whose sum is σ = 64495440. Its totient is φ = 64204036.

The previous prime is 64349723. The next prime is 64349741. The reversal of 64349737 is 73794346.

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, and also an emirpimes, since its reverse is a distinct semiprime: 73794346 = 2 ⋅36897173.

It is a cyclic number.

It is not a de Polignac number, because 64349737 - 2¹⁵ = 64316969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64349693 and 64349702.

It is not an unprimeable number, because it can be changed into a prime (64349717) 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, 72187 + ... + 73072.

It is an arithmetic number, because the mean of its divisors is an integer number (16123860).

Almost surely, 2^64349737 is an apocalyptic number.

It is an amenable number.

64349737 is a deficient number, since it is larger than the sum of its proper divisors (145703).

64349737 is a wasteful number, since it uses less digits than its factorization.

64349737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145702.

The product of its digits is 381024, while the sum is 43.

The square root of 64349737 is about 8021.8287815186. The cubic root of 64349737 is about 400.7272955515.

The spelling of 64349737 in words is "sixty-four million, three hundred forty-nine thousand, seven hundred thirty-seven".