90747783 has 20 divisors (see below), whose sum is σ = 154928400. Its totient is φ = 51855552.

The previous prime is 90747779. The next prime is 90747803. The reversal of 90747783 is 38774709.

It is not a de Polignac number, because 90747783 - 2² = 90747779 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90747703) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 79458 + ... + 80591.

It is an arithmetic number, because the mean of its divisors is an integer number (7746420).

Almost surely, 2^90747783 is an apocalyptic number.

90747783 is a deficient number, since it is larger than the sum of its proper divisors (64180617).

90747783 is a wasteful number, since it uses less digits than its factorization.

90747783 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160068 (or 160059 counting only the distinct ones).

The product of its (nonzero) digits is 296352, while the sum is 45.

The square root of 90747783 is about 9526.1630785957. The cubic root of 90747783 is about 449.3782078948.

The spelling of 90747783 in words is "ninety million, seven hundred forty-seven thousand, seven hundred eighty-three".