90691403 has 16 divisors (see below), whose sum is σ = 102041856. Its totient is φ = 79878240.

The previous prime is 90691373. The next prime is 90691453. The reversal of 90691403 is 30419609.

It is a cyclic number.

It is not a de Polignac number, because 90691403 - 2⁶ = 90691339 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90691403.

It is not an unprimeable number, because it can be changed into a prime (90691453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180050 + ... + 180552.

It is an arithmetic number, because the mean of its divisors is an integer number (6377616).

Almost surely, 2^90691403 is an apocalyptic number.

90691403 is a deficient number, since it is larger than the sum of its proper divisors (11350453).

90691403 is a wasteful number, since it uses less digits than its factorization.

90691403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 994.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 90691403 is about 9523.2034001170. The cubic root of 90691403 is about 449.2851250254.

The spelling of 90691403 in words is "ninety million, six hundred ninety-one thousand, four hundred three".