90487421 has 8 divisors (see below), whose sum is σ = 91500960. Its totient is φ = 89479728.

The previous prime is 90487417. The next prime is 90487433. The reversal of 90487421 is 12478409.

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 90487421 - 2² = 90487417 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 (90487021) 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, 34370 + ... + 36908.

It is an arithmetic number, because the mean of its divisors is an integer number (11437620).

Almost surely, 2^90487421 is an apocalyptic number.

It is an amenable number.

90487421 is a deficient number, since it is larger than the sum of its proper divisors (1013539).

90487421 is a wasteful number, since it uses less digits than its factorization.

90487421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2923.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 90487421 is about 9512.4876346832. The cubic root of 90487421 is about 448.9480299569.

The spelling of 90487421 in words is "ninety million, four hundred eighty-seven thousand, four hundred twenty-one".