90450641 has 2 divisors, whose sum is σ = 90450642. Its totient is φ = 90450640.

The previous prime is 90450593. The next prime is 90450667. The reversal of 90450641 is 14605409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84180625 + 6270016 = 9175^2 + 2504^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90450641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90450671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45225320 + 45225321.

It is an arithmetic number, because the mean of its divisors is an integer number (45225321).

Almost surely, 2^90450641 is an apocalyptic number.

It is an amenable number.

90450641 is a deficient number, since it is larger than the sum of its proper divisors (1).

90450641 is an equidigital number, since it uses as much as digits as its factorization.

90450641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 90450641 is about 9510.5541899513. The cubic root of 90450641 is about 448.8871944430.

The spelling of 90450641 in words is "ninety million, four hundred fifty thousand, six hundred forty-one".