90936247 has 4 divisors (see below), whose sum is σ = 96285456. Its totient is φ = 85587040.

The previous prime is 90936221. The next prime is 90936283. The reversal of 90936247 is 74263909.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74263909 = 241 ⋅308149.

It is a cyclic number.

It is not a de Polignac number, because 90936247 - 2⁷ = 90936119 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90936217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2674579 + ... + 2674612.

It is an arithmetic number, because the mean of its divisors is an integer number (24071364).

Almost surely, 2^90936247 is an apocalyptic number.

90936247 is a deficient number, since it is larger than the sum of its proper divisors (5349209).

90936247 is a wasteful number, since it uses less digits than its factorization.

90936247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5349208.

The product of its (nonzero) digits is 81648, while the sum is 40.

The square root of 90936247 is about 9536.0498635441. The cubic root of 90936247 is about 449.6890806987.

The spelling of 90936247 in words is "ninety million, nine hundred thirty-six thousand, two hundred forty-seven".