634121031 has 8 divisors (see below), whose sum is σ = 858114304. Its totient is φ = 416437560.

The previous prime is 634121023. The next prime is 634121051. The reversal of 634121031 is 130121436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 634121031 - 2³ = 634121023 is a prime.

It is a super-2 number, since 2×634121031² = 804218963913005922, 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 = 634120989 and 634121007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (634121051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1577215 + ... + 1577616.

It is an arithmetic number, because the mean of its divisors is an integer number (107264288).

Almost surely, 2^634121031 is an apocalyptic number.

634121031 is a deficient number, since it is larger than the sum of its proper divisors (223993273).

634121031 is a wasteful number, since it uses less digits than its factorization.

634121031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3154901.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 634121031 is about 25181.7598868705. The cubic root of 634121031 is about 859.1270351229.

Adding to 634121031 its reverse (130121436), we get a palindrome (764242467).

It can be divided in two parts, 6341 and 21031, that added together give a palindrome (27372).

The spelling of 634121031 in words is "six hundred thirty-four million, one hundred twenty-one thousand, thirty-one".