634061531 has 4 divisors (see below), whose sum is σ = 648807192. Its totient is φ = 619315872.

The previous prime is 634061509. The next prime is 634061557. The reversal of 634061531 is 135160436.

It is a happy number.

634061531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-634061531 is a prime.

It is a super-2 number, since 2×634061531² = 804068050188127922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 634061494 and 634061503.

It is not an unprimeable number, because it can be changed into a prime (634061591) 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, 7372766 + ... + 7372851.

It is an arithmetic number, because the mean of its divisors is an integer number (162201798).

Almost surely, 2^634061531 is an apocalyptic number.

634061531 is a deficient number, since it is larger than the sum of its proper divisors (14745661).

634061531 is a wasteful number, since it uses less digits than its factorization.

634061531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14745660.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 634061531 is about 25180.5784484789. The cubic root of 634061531 is about 859.1001634612.

The spelling of 634061531 in words is "six hundred thirty-four million, sixty-one thousand, five hundred thirty-one".