90606401 has 2 divisors, whose sum is σ = 90606402. Its totient is φ = 90606400.

The previous prime is 90606371. The next prime is 90606403. The reversal of 90606401 is 10460609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47059600 + 43546801 = 6860^2 + 6599^2 .

It is a cyclic number.

It is not a de Polignac number, because 90606401 - 2¹⁰ = 90605377 is a prime.

Together with 90606403, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90606403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45303200 + 45303201.

It is an arithmetic number, because the mean of its divisors is an integer number (45303201).

Almost surely, 2^90606401 is an apocalyptic number.

It is an amenable number.

90606401 is a deficient number, since it is larger than the sum of its proper divisors (1).

90606401 is an equidigital number, since it uses as much as digits as its factorization.

90606401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 90606401 is about 9518.7394648661. The cubic root of 90606401 is about 449.1447145396.

The spelling of 90606401 in words is "ninety million, six hundred six thousand, four hundred one".