90345401 has 2 divisors, whose sum is σ = 90345402. Its totient is φ = 90345400.

The previous prime is 90345389. The next prime is 90345419. The reversal of 90345401 is 10454309.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54405376 + 35940025 = 7376^2 + 5995^2 .

It is an emirp because it is prime and its reverse (10454309) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90345401 - 2¹⁰ = 90344377 is a prime.

It is not a weakly prime, because it can be changed into another prime (90345481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45172700 + 45172701.

It is an arithmetic number, because the mean of its divisors is an integer number (45172701).

Almost surely, 2^90345401 is an apocalyptic number.

It is an amenable number.

90345401 is a deficient number, since it is larger than the sum of its proper divisors (1).

90345401 is an equidigital number, since it uses as much as digits as its factorization.

90345401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 90345401 is about 9505.0197790431. The cubic root of 90345401 is about 448.7130323388.

The spelling of 90345401 in words is "ninety million, three hundred forty-five thousand, four hundred one".