90345071 has 2 divisors, whose sum is σ = 90345072. Its totient is φ = 90345070.

The previous prime is 90345053. The next prime is 90345091. The reversal of 90345071 is 17054309.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90345071 - 2⁶ = 90345007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90345041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45172535 + 45172536.

It is an arithmetic number, because the mean of its divisors is an integer number (45172536).

Almost surely, 2^90345071 is an apocalyptic number.

90345071 is a deficient number, since it is larger than the sum of its proper divisors (1).

90345071 is an equidigital number, since it uses as much as digits as its factorization.

90345071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 90345071 is about 9505.0024197788. The cubic root of 90345071 is about 448.7124860078.

The spelling of 90345071 in words is "ninety million, three hundred forty-five thousand, seventy-one".