64402523 has 4 divisors (see below), whose sum is σ = 64481040. Its totient is φ = 64324008.

The previous prime is 64402517. The next prime is 64402529. The reversal of 64402523 is 32520446.

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

It is an interprime number because it is at equal distance from previous prime (64402517) and next prime (64402529).

It is a cyclic number.

It is not a de Polignac number, because 64402523 - 2¹² = 64398427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64402492 and 64402501.

It is not an unprimeable number, because it can be changed into a prime (64402529) 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, 38015 + ... + 39672.

It is an arithmetic number, because the mean of its divisors is an integer number (16120260).

Almost surely, 2^64402523 is an apocalyptic number.

64402523 is a deficient number, since it is larger than the sum of its proper divisors (78517).

64402523 is an equidigital number, since it uses as much as digits as its factorization.

64402523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78516.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 64402523 is about 8025.1182545804. The cubic root of 64402523 is about 400.8368376194.

Adding to 64402523 its reverse (32520446), we get a palindrome (96922969).

The spelling of 64402523 in words is "sixty-four million, four hundred two thousand, five hundred twenty-three".