90561403 has 12 divisors (see below), whose sum is σ = 94381560. Its totient is φ = 86890496.

The previous prime is 90561379. The next prime is 90561407. The reversal of 90561403 is 30416509.

It is not a de Polignac number, because 90561403 - 2²¹ = 88464251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90561407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 215928 + ... + 216346.

It is an arithmetic number, because the mean of its divisors is an integer number (7865130).

Almost surely, 2^90561403 is an apocalyptic number.

90561403 is a deficient number, since it is larger than the sum of its proper divisors (3820157).

90561403 is a wasteful number, since it uses less digits than its factorization.

90561403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 734 (or 705 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 90561403 is about 9516.3755180216. The cubic root of 90561403 is about 449.0703490779.

The spelling of 90561403 in words is "ninety million, five hundred sixty-one thousand, four hundred three".