90790001 has 2 divisors, whose sum is σ = 90790002. Its totient is φ = 90790000.

The previous prime is 90789997. The next prime is 90790003. The reversal of 90790001 is 10009709.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53640976 + 37149025 = 7324^2 + 6095^2 .

It is an emirp because it is prime and its reverse (10009709) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90790001 - 2² = 90789997 is a prime.

Together with 90790003, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_5260193 and since 90790001 and 5260193 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (90790003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45395000 + 45395001.

It is an arithmetic number, because the mean of its divisors is an integer number (45395001).

Almost surely, 2^90790001 is an apocalyptic number.

It is an amenable number.

90790001 is a deficient number, since it is larger than the sum of its proper divisors (1).

90790001 is an equidigital number, since it uses as much as digits as its factorization.

90790001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 90790001 is about 9528.3787183340. The cubic root of 90790001 is about 449.4478841898.

The spelling of 90790001 in words is "ninety million, seven hundred ninety thousand, one".