90606161 has 2 divisors, whose sum is σ = 90606162. Its totient is φ = 90606160.

The previous prime is 90606133. The next prime is 90606181. The reversal of 90606161 is 16160609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52475536 + 38130625 = 7244^2 + 6175^2 .

It is an emirp because it is prime and its reverse (16160609) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90606161 is a prime.

It is a super-2 number, since 2×90606161² = 16418952822315842, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90606101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45303080 + 45303081.

It is an arithmetic number, because the mean of its divisors is an integer number (45303081).

Almost surely, 2^90606161 is an apocalyptic number.

It is an amenable number.

90606161 is a deficient number, since it is larger than the sum of its proper divisors (1).

90606161 is an equidigital number, since it uses as much as digits as its factorization.

90606161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 90606161 is about 9518.7268581465. The cubic root of 90606161 is about 449.1443179715.

The spelling of 90606161 in words is "ninety million, six hundred six thousand, one hundred sixty-one".