64401413 has 4 divisors (see below), whose sum is σ = 65616588. Its totient is φ = 63186240.

The previous prime is 64401409. The next prime is 64401419. The reversal of 64401413 is 31410446.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31888609 + 32512804 = 5647^2 + 5702^2 .

It is a cyclic number.

It is not a de Polignac number, because 64401413 - 2² = 64401409 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 (64401419) 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, 607508 + ... + 607613.

It is an arithmetic number, because the mean of its divisors is an integer number (16404147).

Almost surely, 2^64401413 is an apocalyptic number.

It is an amenable number.

64401413 is a deficient number, since it is larger than the sum of its proper divisors (1215175).

64401413 is a wasteful number, since it uses less digits than its factorization.

64401413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1215174.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 64401413 is about 8025.0490964230. The cubic root of 64401413 is about 400.8345347518.

Adding to 64401413 its reverse (31410446), we get a palindrome (95811859).

The spelling of 64401413 in words is "sixty-four million, four hundred one thousand, four hundred thirteen".