100478431 has 2 divisors, whose sum is σ = 100478432. Its totient is φ = 100478430.

The previous prime is 100478429. The next prime is 100478437. The reversal of 100478431 is 134874001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 100478431 - 2¹ = 100478429 is a prime.

It is a super-2 number, since 2×100478431² = 20191830192443522, which contains 22 as substring.

Together with 100478429, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 100478431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100478437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50239215 + 50239216.

It is an arithmetic number, because the mean of its divisors is an integer number (50239216).

Almost surely, 2^100478431 is an apocalyptic number.

100478431 is a deficient number, since it is larger than the sum of its proper divisors (1).

100478431 is an equidigital number, since it uses as much as digits as its factorization.

100478431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 100478431 is about 10023.8930062127. The cubic root of 100478431 is about 464.8979326601.

The spelling of 100478431 in words is "one hundred million, four hundred seventy-eight thousand, four hundred thirty-one".