90765729 has 12 divisors (see below), whose sum is σ = 132686736. Its totient is φ = 59780952.

The previous prime is 90765673. The next prime is 90765739. The reversal of 90765729 is 92756709.

90765729 is a `hidden beast` number, since 9 + 0 + 76 + 572 + 9 = 666.

It is not a de Polignac number, because 90765729 - 2²⁴ = 73988513 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90765739) 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, 60007 + ... + 61500.

It is an arithmetic number, because the mean of its divisors is an integer number (11057228).

Almost surely, 2^90765729 is an apocalyptic number.

It is an amenable number.

90765729 is a deficient number, since it is larger than the sum of its proper divisors (41921007).

90765729 is a wasteful number, since it uses less digits than its factorization.

90765729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121596 (or 121593 counting only the distinct ones).

The product of its (nonzero) digits is 238140, while the sum is 45.

The square root of 90765729 is about 9527.1049642586. The cubic root of 90765729 is about 449.4078284890.

The spelling of 90765729 in words is "ninety million, seven hundred sixty-five thousand, seven hundred twenty-nine".