100403831 has 4 divisors (see below), whose sum is σ = 109531464. Its totient is φ = 91276200.

The previous prime is 100403803. The next prime is 100403843. The reversal of 100403831 is 138304001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138304001 = 11 ⋅12573091.

It is a cyclic number.

It is not a de Polignac number, because 100403831 - 2²² = 96209527 is a prime.

It is a super-2 number, since 2×100403831² = 20161858558953122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100403801) 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, 4563800 + ... + 4563821.

It is an arithmetic number, because the mean of its divisors is an integer number (27382866).

Almost surely, 2^100403831 is an apocalyptic number.

100403831 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

100403831 is a deficient number, since it is larger than the sum of its proper divisors (9127633).

100403831 is an equidigital number, since it uses as much as digits as its factorization.

100403831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9127632.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 100403831 is about 10020.1712061222. The cubic root of 100403831 is about 464.7828500100.

Adding to 100403831 its reverse (138304001), we get a palindrome (238707832).

The spelling of 100403831 in words is "one hundred million, four hundred three thousand, eight hundred thirty-one".