64401473 has 4 divisors (see below), whose sum is σ = 65308608. Its totient is φ = 63494340.

The previous prime is 64401427. The next prime is 64401479. The reversal of 64401473 is 37410446.

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 a cyclic number.

It is not a de Polignac number, because 64401473 - 2⁶ = 64401409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64401479) 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, 453461 + ... + 453602.

It is an arithmetic number, because the mean of its divisors is an integer number (16327152).

Almost surely, 2^64401473 is an apocalyptic number.

It is an amenable number.

64401473 is a deficient number, since it is larger than the sum of its proper divisors (907135).

64401473 is an equidigital number, since it uses as much as digits as its factorization.

64401473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907134.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 64401473 is about 8025.0528347170. The cubic root of 64401473 is about 400.8346592319.

The spelling of 64401473 in words is "sixty-four million, four hundred one thousand, four hundred seventy-three".