90873653 has 8 divisors (see below), whose sum is σ = 103620888. Its totient is φ = 78948864.

The previous prime is 90873649. The next prime is 90873659. The reversal of 90873653 is 35637809.

It can be written as a sum of positive squares in 4 ways, for example, as 3301489 + 87572164 = 1817^2 + 9358^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90873653 - 2² = 90873649 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90873653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90873659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 205376 + ... + 205817.

It is an arithmetic number, because the mean of its divisors is an integer number (12952611).

Almost surely, 2^90873653 is an apocalyptic number.

It is an amenable number.

90873653 is a deficient number, since it is larger than the sum of its proper divisors (12747235).

90873653 is a wasteful number, since it uses less digits than its factorization.

90873653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411223.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 90873653 is about 9532.7673316829. The cubic root of 90873653 is about 449.5858790967.

The spelling of 90873653 in words is "ninety million, eight hundred seventy-three thousand, six hundred fifty-three".