90849937 has 2 divisors, whose sum is σ = 90849938. Its totient is φ = 90849936.

The previous prime is 90849907. The next prime is 90849961. The reversal of 90849937 is 73994809.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63297936 + 27552001 = 7956^2 + 5249^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90849937 is a prime.

It is a super-2 number, since 2×90849937² = 16507422105807938, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (90849907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45424968 + 45424969.

It is an arithmetic number, because the mean of its divisors is an integer number (45424969).

Almost surely, 2^90849937 is an apocalyptic number.

It is an amenable number.

90849937 is a deficient number, since it is larger than the sum of its proper divisors (1).

90849937 is an equidigital number, since it uses as much as digits as its factorization.

90849937 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 90849937 is about 9531.5233305070. The cubic root of 90849937 is about 449.5467650593.

The spelling of 90849937 in words is "ninety million, eight hundred forty-nine thousand, nine hundred thirty-seven".