90148749157 has 2 divisors, whose sum is σ = 90148749158. Its totient is φ = 90148749156.

The previous prime is 90148749143. The next prime is 90148749169. The reversal of 90148749157 is 75194784109.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 85609493281 + 4539255876 = 292591^2 + 67374^2 .

It is an emirp because it is prime and its reverse (75194784109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90148749157 - 2¹⁵ = 90148716389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90148749098 and 90148749107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90148749107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45074374578 + 45074374579.

It is an arithmetic number, because the mean of its divisors is an integer number (45074374579).

Almost surely, 2^90148749157 is an apocalyptic number.

It is an amenable number.

90148749157 is a deficient number, since it is larger than the sum of its proper divisors (1).

90148749157 is an equidigital number, since it uses as much as digits as its factorization.

90148749157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2540160, while the sum is 55.

The spelling of 90148749157 in words is "ninety billion, one hundred forty-eight million, seven hundred forty-nine thousand, one hundred fifty-seven".