90712439 has 4 divisors (see below), whose sum is σ = 92066424. Its totient is φ = 89358456.

The previous prime is 90712423. The next prime is 90712469. The reversal of 90712439 is 93421709.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93421709 = 3833 ⋅24373.

It is a cyclic number.

It is not a de Polignac number, because 90712439 - 2⁴ = 90712423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90712399 and 90712408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90712469) 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, 676892 + ... + 677025.

It is an arithmetic number, because the mean of its divisors is an integer number (23016606).

Almost surely, 2^90712439 is an apocalyptic number.

90712439 is a deficient number, since it is larger than the sum of its proper divisors (1353985).

90712439 is a wasteful number, since it uses less digits than its factorization.

90712439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1353984.

The product of its (nonzero) digits is 13608, while the sum is 35.

The square root of 90712439 is about 9524.3077963703. The cubic root of 90712439 is about 449.3198597813.

The spelling of 90712439 in words is "ninety million, seven hundred twelve thousand, four hundred thirty-nine".