133791157 has 2 divisors, whose sum is σ = 133791158. Its totient is φ = 133791156.

The previous prime is 133791137. The next prime is 133791197. The reversal of 133791157 is 751197331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126360081 + 7431076 = 11241^2 + 2726^2 .

It is an emirp because it is prime and its reverse (751197331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 133791157 - 2⁷ = 133791029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133791127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66895578 + 66895579.

It is an arithmetic number, because the mean of its divisors is an integer number (66895579).

Almost surely, 2^133791157 is an apocalyptic number.

It is an amenable number.

133791157 is a deficient number, since it is larger than the sum of its proper divisors (1).

133791157 is an equidigital number, since it uses as much as digits as its factorization.

133791157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19845, while the sum is 37.

The square root of 133791157 is about 11566.8127416328. The cubic root of 133791157 is about 511.4570112748.

The spelling of 133791157 in words is "one hundred thirty-three million, seven hundred ninety-one thousand, one hundred fifty-seven".