100637431 has 4 divisors (see below), whose sum is σ = 101313000. Its totient is φ = 99961864.

The previous prime is 100637419. The next prime is 100637479. The reversal of 100637431 is 134736001.

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 100637431 - 2¹⁵ = 100604663 is a prime.

It is a super-2 number, since 2×100637431² = 20255785036559522, 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 = 100637396 and 100637405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100637491) 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, 337561 + ... + 337858.

It is an arithmetic number, because the mean of its divisors is an integer number (25328250).

Almost surely, 2^100637431 is an apocalyptic number.

100637431 is a deficient number, since it is larger than the sum of its proper divisors (675569).

100637431 is an equidigital number, since it uses as much as digits as its factorization.

100637431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 675568.

The product of its (nonzero) digits is 1512, while the sum is 25.

The square root of 100637431 is about 10031.8209214479. The cubic root of 100637431 is about 465.1430261075.

The spelling of 100637431 in words is "one hundred million, six hundred thirty-seven thousand, four hundred thirty-one".