90743615 has 4 divisors (see below), whose sum is σ = 108892344. Its totient is φ = 72594888.

The previous prime is 90743561. The next prime is 90743617. The reversal of 90743615 is 51634709.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51634709 = 7 ⋅7376387.

It is a cyclic number.

It is not a de Polignac number, because 90743615 - 2¹⁰ = 90742591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90743617) 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, 9074357 + ... + 9074366.

It is an arithmetic number, because the mean of its divisors is an integer number (27223086).

Almost surely, 2^90743615 is an apocalyptic number.

90743615 is a deficient number, since it is larger than the sum of its proper divisors (18148729).

90743615 is a wasteful number, since it uses less digits than its factorization.

90743615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18148728.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 90743615 is about 9525.9443101458. The cubic root of 90743615 is about 449.3713278845.

The spelling of 90743615 in words is "ninety million, seven hundred forty-three thousand, six hundred fifteen".