90012421007 has 4 divisors (see below), whose sum is σ = 90024703320. Its totient is φ = 90000138696.

The previous prime is 90012421001. The next prime is 90012421073. The reversal of 90012421007 is 70012421009.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90012421007 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 (90012421001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6130157 + ... + 6144822.

It is an arithmetic number, because the mean of its divisors is an integer number (22506175830).

Almost surely, 2^90012421007 is an apocalyptic number.

90012421007 is a deficient number, since it is larger than the sum of its proper divisors (12282313).

90012421007 is a wasteful number, since it uses less digits than its factorization.

90012421007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12282312.

The product of its (nonzero) digits is 1008, while the sum is 26.

The spelling of 90012421007 in words is "ninety billion, twelve million, four hundred twenty-one thousand, seven".