90170403434 has 16 divisors (see below), whose sum is σ = 138145315968. Its totient is φ = 44122130592.

The previous prime is 90170403419. The next prime is 90170403437. The reversal of 90170403434 is 43430407109.

It is a junction number, because it is equal to n+sod(n) for n = 90170403394 and 90170403403.

It is not an unprimeable number, because it can be changed into a prime (90170403437) 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, 1273349 + ... + 1342295.

It is an arithmetic number, because the mean of its divisors is an integer number (8634082248).

Almost surely, 2^90170403434 is an apocalyptic number.

90170403434 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

90170403434 is a deficient number, since it is larger than the sum of its proper divisors (47974912534).

90170403434 is a wasteful number, since it uses less digits than its factorization.

90170403434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82909.

The product of its (nonzero) digits is 36288, while the sum is 35.

The spelling of 90170403434 in words is "ninety billion, one hundred seventy million, four hundred three thousand, four hundred thirty-four".