90146197 has 2 divisors, whose sum is σ = 90146198. Its totient is φ = 90146196.

The previous prime is 90146153. The next prime is 90146207. The reversal of 90146197 is 79164109.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75099556 + 15046641 = 8666^2 + 3879^2 .

It is an emirp because it is prime and its reverse (79164109) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90146197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90246197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45073098 + 45073099.

It is an arithmetic number, because the mean of its divisors is an integer number (45073099).

Almost surely, 2^90146197 is an apocalyptic number.

It is an amenable number.

90146197 is a deficient number, since it is larger than the sum of its proper divisors (1).

90146197 is an equidigital number, since it uses as much as digits as its factorization.

90146197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 90146197 is about 9494.5351123686. The cubic root of 90146197 is about 448.3829981726.

The spelling of 90146197 in words is "ninety million, one hundred forty-six thousand, one hundred ninety-seven".