90983656157 has 2 divisors, whose sum is σ = 90983656158. Its totient is φ = 90983656156.

The previous prime is 90983656147. The next prime is 90983656193. The reversal of 90983656157 is 75165638909.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81351018841 + 9632637316 = 285221^2 + 98146^2 .

It is an emirp because it is prime and its reverse (75165638909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90983656157 - 2⁸ = 90983655901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90983656096 and 90983656105.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90983656147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45491828078 + 45491828079.

It is an arithmetic number, because the mean of its divisors is an integer number (45491828079).

Almost surely, 2^90983656157 is an apocalyptic number.

It is an amenable number.

90983656157 is a deficient number, since it is larger than the sum of its proper divisors (1).

90983656157 is an equidigital number, since it uses as much as digits as its factorization.

90983656157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12247200, while the sum is 59.

The spelling of 90983656157 in words is "ninety billion, nine hundred eighty-three million, six hundred fifty-six thousand, one hundred fifty-seven".