90343431 has 10 divisors (see below), whose sum is σ = 134957592. Its totient is φ = 60228900.

The previous prime is 90343411. The next prime is 90343441. The reversal of 90343431 is 13434309.

It is not a de Polignac number, because 90343431 - 2⁵ = 90343399 is a prime.

It is a super-2 number, since 2×90343431² = 16323871049703522, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 90343395 and 90343404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90343411) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 557595 + ... + 557756.

Almost surely, 2^90343431 is an apocalyptic number.

90343431 is a deficient number, since it is larger than the sum of its proper divisors (44614161).

90343431 is a wasteful number, since it uses less digits than its factorization.

90343431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115363 (or 1115354 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 90343431 is about 9504.9161490252. The cubic root of 90343431 is about 448.7097708885.

The spelling of 90343431 in words is "ninety million, three hundred forty-three thousand, four hundred thirty-one".