90630401 has 2 divisors, whose sum is σ = 90630402. Its totient is φ = 90630400.

The previous prime is 90630389. The next prime is 90630409. The reversal of 90630401 is 10403609.

It is a Cunningham number, because it is equal to 9520²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90630400 + 1 = 9520^2 + 1^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90630401 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90630409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45315200 + 45315201.

It is an arithmetic number, because the mean of its divisors is an integer number (45315201).

Almost surely, 2^90630401 is an apocalyptic number.

It is an amenable number.

90630401 is a deficient number, since it is larger than the sum of its proper divisors (1).

90630401 is an equidigital number, since it uses as much as digits as its factorization.

90630401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 90630401 is about 9520.0000525210. Note that the first 4 decimals coincide. The cubic root of 90630401 is about 449.1843678143.

The spelling of 90630401 in words is "ninety million, six hundred thirty thousand, four hundred one".