961791137 has 2 divisors, whose sum is σ = 961791138. Its totient is φ = 961791136.

The previous prime is 961791073. The next prime is 961791143. The reversal of 961791137 is 731197169.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 802248976 + 159542161 = 28324^2 + 12631^2 .

It is a cyclic number.

It is not a de Polignac number, because 961791137 - 2⁶ = 961791073 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (961791157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480895568 + 480895569.

It is an arithmetic number, because the mean of its divisors is an integer number (480895569).

Almost surely, 2^961791137 is an apocalyptic number.

It is an amenable number.

961791137 is a deficient number, since it is larger than the sum of its proper divisors (1).

961791137 is an equidigital number, since it uses as much as digits as its factorization.

961791137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 71442, while the sum is 44.

The square root of 961791137 is about 31012.7576490708. The cubic root of 961791137 is about 987.0979657470.

The spelling of 961791137 in words is "nine hundred sixty-one million, seven hundred ninety-one thousand, one hundred thirty-seven".