90431417 has 2 divisors, whose sum is σ = 90431418. Its totient is φ = 90431416.

The previous prime is 90431399. The next prime is 90431447. The reversal of 90431417 is 71413409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49266361 + 41165056 = 7019^2 + 6416^2 .

It is an emirp because it is prime and its reverse (71413409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90431417 - 2⁸ = 90431161 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90431417.

It is not a weakly prime, because it can be changed into another prime (90431447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45215708 + 45215709.

It is an arithmetic number, because the mean of its divisors is an integer number (45215709).

Almost surely, 2^90431417 is an apocalyptic number.

It is an amenable number.

90431417 is a deficient number, since it is larger than the sum of its proper divisors (1).

90431417 is an equidigital number, since it uses as much as digits as its factorization.

90431417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 90431417 is about 9509.5434695889. The cubic root of 90431417 is about 448.8553906557.

The spelling of 90431417 in words is "ninety million, four hundred thirty-one thousand, four hundred seventeen".