90157727 has 4 divisors (see below), whose sum is σ = 98353896. Its totient is φ = 81961560.

The previous prime is 90157709. The next prime is 90157733. The reversal of 90157727 is 72775109.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72775109 = 11 ⋅6615919.

It is a cyclic number.

It is not a de Polignac number, because 90157727 - 2⁶ = 90157663 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 (90157747) 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, 4098068 + ... + 4098089.

It is an arithmetic number, because the mean of its divisors is an integer number (24588474).

Almost surely, 2^90157727 is an apocalyptic number.

90157727 is a deficient number, since it is larger than the sum of its proper divisors (8196169).

90157727 is a wasteful number, since it uses less digits than its factorization.

90157727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8196168.

The product of its (nonzero) digits is 30870, while the sum is 38.

The square root of 90157727 is about 9495.1422843473. The cubic root of 90157727 is about 448.4021139192.

The spelling of 90157727 in words is "ninety million, one hundred fifty-seven thousand, seven hundred twenty-seven".