90007197757 has 2 divisors, whose sum is σ = 90007197758. Its totient is φ = 90007197756.

The previous prime is 90007197713. The next prime is 90007197769. The reversal of 90007197757 is 75779170009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64933742041 + 25073455716 = 254821^2 + 158346^2 .

It is an emirp because it is prime and its reverse (75779170009) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90007197757 - 2¹¹ = 90007195709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90007197457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45003598878 + 45003598879.

It is an arithmetic number, because the mean of its divisors is an integer number (45003598879).

Almost surely, 2^90007197757 is an apocalyptic number.

It is an amenable number.

90007197757 is a deficient number, since it is larger than the sum of its proper divisors (1).

90007197757 is an equidigital number, since it uses as much as digits as its factorization.

90007197757 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972405, while the sum is 52.

The spelling of 90007197757 in words is "ninety billion, seven million, one hundred ninety-seven thousand, seven hundred fifty-seven".