90874421 has 8 divisors (see below), whose sum is σ = 99316800. Its totient is φ = 82462240.

The previous prime is 90874417. The next prime is 90874439. The reversal of 90874421 is 12447809.

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 90874421 - 2² = 90874417 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90874451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1001 + ... + 13518.

It is an arithmetic number, because the mean of its divisors is an integer number (12414600).

Almost surely, 2^90874421 is an apocalyptic number.

90874421 is the 5096-th centered heptagonal number.

It is an amenable number.

90874421 is a deficient number, since it is larger than the sum of its proper divisors (8442379).

90874421 is a wasteful number, since it uses less digits than its factorization.

90874421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15099.

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

The square root of 90874421 is about 9532.8076137096. The cubic root of 90874421 is about 449.5871456207.

The spelling of 90874421 in words is "ninety million, eight hundred seventy-four thousand, four hundred twenty-one".