90753643 has 4 divisors (see below), whose sum is σ = 90810720. Its totient is φ = 90696568.

The previous prime is 90753631. The next prime is 90753659. The reversal of 90753643 is 34635709.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34635709 = 701 ⋅49409.

It is a cyclic number.

It is not a de Polignac number, because 90753643 - 2²⁵ = 57199211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90753683) 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, 26083 + ... + 29356.

It is an arithmetic number, because the mean of its divisors is an integer number (22702680).

Almost surely, 2^90753643 is an apocalyptic number.

90753643 is a deficient number, since it is larger than the sum of its proper divisors (57077).

90753643 is a wasteful number, since it uses less digits than its factorization.

90753643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57076.

The product of its (nonzero) digits is 68040, while the sum is 37.

The square root of 90753643 is about 9526.4706476218. The cubic root of 90753643 is about 449.3878804896.

The spelling of 90753643 in words is "ninety million, seven hundred fifty-three thousand, six hundred forty-three".