9138294157 has 2 divisors, whose sum is σ = 9138294158. Its totient is φ = 9138294156.

The previous prime is 9138294133. The next prime is 9138294163. The reversal of 9138294157 is 7514928319.

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., 8125399881 + 1012894276 = 90141^2 + 31826^2 .

It is a cyclic number.

It is not a de Polignac number, because 9138294157 - 2¹⁵ = 9138261389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 9138294157.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9138394157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4569147078 + 4569147079.

It is an arithmetic number, because the mean of its divisors is an integer number (4569147079).

Almost surely, 2^9138294157 is an apocalyptic number.

It is an amenable number.

9138294157 is a deficient number, since it is larger than the sum of its proper divisors (1).

9138294157 is an equidigital number, since it uses as much as digits as its factorization.

9138294157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 49.

The square root of 9138294157 is about 95594.4253447867. The cubic root of 9138294157 is about 2090.6839147420.

The spelling of 9138294157 in words is "nine billion, one hundred thirty-eight million, two hundred ninety-four thousand, one hundred fifty-seven".