90420727 has 4 divisors (see below), whose sum is σ = 91903096. Its totient is φ = 88938360.

The previous prime is 90420697. The next prime is 90420749. The reversal of 90420727 is 72702409.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90420727 - 2⁷ = 90420599 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 (90424727) 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, 741093 + ... + 741214.

It is an arithmetic number, because the mean of its divisors is an integer number (22975774).

Almost surely, 2^90420727 is an apocalyptic number.

90420727 is a deficient number, since it is larger than the sum of its proper divisors (1482369).

90420727 is a wasteful number, since it uses less digits than its factorization.

90420727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1482368.

The product of its (nonzero) digits is 7056, while the sum is 31.

The square root of 90420727 is about 9508.9813860371. The cubic root of 90420727 is about 448.8377033911.

The spelling of 90420727 in words is "ninety million, four hundred twenty thousand, seven hundred twenty-seven".