90034921 has 2 divisors, whose sum is σ = 90034922. Its totient is φ = 90034920.

The previous prime is 90034891. The next prime is 90034927. The reversal of 90034921 is 12943009.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89965225 + 69696 = 9485^2 + 264^2 .

It is a cyclic number.

It is not a de Polignac number, because 90034921 - 2⁷ = 90034793 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90034921.

It is not a weakly prime, because it can be changed into another prime (90034927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45017460 + 45017461.

It is an arithmetic number, because the mean of its divisors is an integer number (45017461).

Almost surely, 2^90034921 is an apocalyptic number.

It is an amenable number.

90034921 is a deficient number, since it is larger than the sum of its proper divisors (1).

90034921 is an equidigital number, since it uses as much as digits as its factorization.

90034921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 90034921 is about 9488.6733003092. The cubic root of 90034921 is about 448.1984283220.

It can be divided in two parts, 9003 and 4921, that added together give a square (13924 = 118²).

The spelling of 90034921 in words is "ninety million, thirty-four thousand, nine hundred twenty-one".