90454901 has 2 divisors, whose sum is σ = 90454902. Its totient is φ = 90454900.

The previous prime is 90454879. The next prime is 90454907. The reversal of 90454901 is 10945409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56640676 + 33814225 = 7526^2 + 5815^2 .

It is an emirp because it is prime and its reverse (10945409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90454901 - 2¹⁸ = 90192757 is a prime.

It is a super-2 number, since 2×90454901² = 16364178229839602, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90454907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45227450 + 45227451.

It is an arithmetic number, because the mean of its divisors is an integer number (45227451).

Almost surely, 2^90454901 is an apocalyptic number.

It is an amenable number.

90454901 is a deficient number, since it is larger than the sum of its proper divisors (1).

90454901 is an equidigital number, since it uses as much as digits as its factorization.

90454901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 90454901 is about 9510.7781490265. The cubic root of 90454901 is about 448.8942414888.

The spelling of 90454901 in words is "ninety million, four hundred fifty-four thousand, nine hundred one".