90511693 has 4 divisors (see below), whose sum is σ = 94447008. Its totient is φ = 86576380.

The previous prime is 90511679. The next prime is 90511721. The reversal of 90511693 is 39611509.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90511693 - 2⁹ = 90511181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90511793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1967623 + ... + 1967668.

It is an arithmetic number, because the mean of its divisors is an integer number (23611752).

Almost surely, 2^90511693 is an apocalyptic number.

It is an amenable number.

90511693 is a deficient number, since it is larger than the sum of its proper divisors (3935315).

90511693 is a wasteful number, since it uses less digits than its factorization.

90511693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3935314.

The product of its (nonzero) digits is 7290, while the sum is 34.

The square root of 90511693 is about 9513.7633458059. The cubic root of 90511693 is about 448.9881677363.

It can be divided in two parts, 90511 and 693, that added together give a square (91204 = 302²).

The spelling of 90511693 in words is "ninety million, five hundred eleven thousand, six hundred ninety-three".