90897157 has 6 divisors (see below), whose sum is σ = 98427282. Its totient is φ = 83904912.

The previous prime is 90897151. The next prime is 90897161. The reversal of 90897157 is 75179809.

It is a Cunningham number, because it is equal to 9534²+1.

It can be written as a sum of positive squares in 3 ways, for example, as 1 + 90897156 = 1^2 + 9534^2 .

It is not a de Polignac number, because 90897157 - 2²³ = 82508549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90897151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 268758 + ... + 269095.

It is an arithmetic number, because the mean of its divisors is an integer number (16404547).

Almost surely, 2^90897157 is an apocalyptic number.

It is an amenable number.

90897157 is a deficient number, since it is larger than the sum of its proper divisors (7530125).

90897157 is a wasteful number, since it uses less digits than its factorization.

90897157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537879 (or 537866 counting only the distinct ones).

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 90897157 is about 9534.0000524439. Note that the first 4 decimals coincide. The cubic root of 90897157 is about 449.6246367756.

The spelling of 90897157 in words is "ninety million, eight hundred ninety-seven thousand, one hundred fifty-seven".