90612539 has 4 divisors (see below), whose sum is σ = 95381640. Its totient is φ = 85843440.

The previous prime is 90612523. The next prime is 90612541. The reversal of 90612539 is 93521609.

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

It is a cyclic number.

It is not a de Polignac number, because 90612539 - 2⁴ = 90612523 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90612499 and 90612508.

It is not an unprimeable number, because it can be changed into a prime (90612439) 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, 2384522 + ... + 2384559.

It is an arithmetic number, because the mean of its divisors is an integer number (23845410).

Almost surely, 2^90612539 is an apocalyptic number.

90612539 is a deficient number, since it is larger than the sum of its proper divisors (4769101).

90612539 is a wasteful number, since it uses less digits than its factorization.

90612539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4769100.

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 90612539 is about 9519.0618760464. The cubic root of 90612539 is about 449.1548565310.

The spelling of 90612539 in words is "ninety million, six hundred twelve thousand, five hundred thirty-nine".