90920077 has 2 divisors, whose sum is σ = 90920078. Its totient is φ = 90920076.

The previous prime is 90920059. The next prime is 90920107. The reversal of 90920077 is 77002909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88566921 + 2353156 = 9411^2 + 1534^2 .

It is an emirp because it is prime and its reverse (77002909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90920077 - 2¹¹ = 90918029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90920677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45460038 + 45460039.

It is an arithmetic number, because the mean of its divisors is an integer number (45460039).

Almost surely, 2^90920077 is an apocalyptic number.

It is an amenable number.

90920077 is a deficient number, since it is larger than the sum of its proper divisors (1).

90920077 is an equidigital number, since it uses as much as digits as its factorization.

90920077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 34.

The square root of 90920077 is about 9535.2019905191. The cubic root of 90920077 is about 449.6624250151.

The spelling of 90920077 in words is "ninety million, nine hundred twenty thousand, seventy-seven".