90429161 has 2 divisors, whose sum is σ = 90429162. Its totient is φ = 90429160.

The previous prime is 90429127. The next prime is 90429173. The reversal of 90429161 is 16192409.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81090025 + 9339136 = 9005^2 + 3056^2 .

It is an emirp because it is prime and its reverse (16192409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90429161 - 2²² = 86234857 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (90429121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45214580 + 45214581.

It is an arithmetic number, because the mean of its divisors is an integer number (45214581).

Almost surely, 2^90429161 is an apocalyptic number.

It is an amenable number.

90429161 is a deficient number, since it is larger than the sum of its proper divisors (1).

90429161 is an equidigital number, since it uses as much as digits as its factorization.

90429161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 90429161 is about 9509.4248511674. The cubic root of 90429161 is about 448.8516580806.

The spelling of 90429161 in words is "ninety million, four hundred twenty-nine thousand, one hundred sixty-one".