90930761 has 4 divisors (see below), whose sum is σ = 91735572. Its totient is φ = 90125952.

The previous prime is 90930737. The next prime is 90930787. The reversal of 90930761 is 16703909.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 40960000 + 49970761 = 6400^2 + 7069^2 .

It is a cyclic number.

It is not a de Polignac number, because 90930761 - 2²² = 86736457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90930701) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402236 + ... + 402461.

It is an arithmetic number, because the mean of its divisors is an integer number (22933893).

Almost surely, 2^90930761 is an apocalyptic number.

It is an amenable number.

90930761 is a deficient number, since it is larger than the sum of its proper divisors (804811).

90930761 is a wasteful number, since it uses less digits than its factorization.

90930761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804810.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 90930761 is about 9535.7622138977. The cubic root of 90930761 is about 449.6800375724.

The spelling of 90930761 in words is "ninety million, nine hundred thirty thousand, seven hundred sixty-one".