9189840157 has 2 divisors, whose sum is σ = 9189840158. Its totient is φ = 9189840156.

The previous prime is 9189840053. The next prime is 9189840169. The reversal of 9189840157 is 7510489819.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8893621636 + 296218521 = 94306^2 + 17211^2 .

It is a cyclic number.

It is not a de Polignac number, because 9189840157 - 2³¹ = 7042356509 is a prime.

It is a super-3 number, since 3×9189840157³ (a number of 31 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9189840757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4594920078 + 4594920079.

It is an arithmetic number, because the mean of its divisors is an integer number (4594920079).

Almost surely, 2^9189840157 is an apocalyptic number.

It is an amenable number.

9189840157 is a deficient number, since it is larger than the sum of its proper divisors (1).

9189840157 is an equidigital number, since it uses as much as digits as its factorization.

9189840157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 52.

The square root of 9189840157 is about 95863.6539935757. The cubic root of 9189840157 is about 2094.6074917000.

The spelling of 9189840157 in words is "nine billion, one hundred eighty-nine million, eight hundred forty thousand, one hundred fifty-seven".