634726427 has 4 divisors (see below), whose sum is σ = 635039760. Its totient is φ = 634413096.

The previous prime is 634726363. The next prime is 634726487. The reversal of 634726427 is 724627436.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 634726427 - 2⁶ = 634726363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (634726487) 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, 153608 + ... + 157685.

It is an arithmetic number, because the mean of its divisors is an integer number (158759940).

Almost surely, 2^634726427 is an apocalyptic number.

634726427 is a deficient number, since it is larger than the sum of its proper divisors (313333).

634726427 is a wasteful number, since it uses less digits than its factorization.

634726427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313332.

The product of its digits is 338688, while the sum is 41.

The square root of 634726427 is about 25193.7775452591. Note that the first 3 decimals coincide. The cubic root of 634726427 is about 859.4003513174.

The spelling of 634726427 in words is "six hundred thirty-four million, seven hundred twenty-six thousand, four hundred twenty-seven".