90195403 has 2 divisors, whose sum is σ = 90195404. Its totient is φ = 90195402.

The previous prime is 90195389. The next prime is 90195407. The reversal of 90195403 is 30459109.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90195403 is a prime.

It is not a weakly prime, because it can be changed into another prime (90195407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45097701 + 45097702.

It is an arithmetic number, because the mean of its divisors is an integer number (45097702).

Almost surely, 2^90195403 is an apocalyptic number.

90195403 is a deficient number, since it is larger than the sum of its proper divisors (1).

90195403 is an equidigital number, since it uses as much as digits as its factorization.

90195403 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 90195403 is about 9497.1260389657. The cubic root of 90195403 is about 448.4645661196.

The spelling of 90195403 in words is "ninety million, one hundred ninety-five thousand, four hundred three".