1197657137 has 2 divisors, whose sum is σ = 1197657138. Its totient is φ = 1197657136.

The previous prime is 1197657119. The next prime is 1197657161. The reversal of 1197657137 is 7317567911.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 781537936 + 416119201 = 27956^2 + 20399^2 .

It is a cyclic number.

It is not a de Polignac number, because 1197657137 - 2⁸ = 1197656881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1197657091 and 1197657100.

It is not a weakly prime, because it can be changed into another prime (1197657187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 598828568 + 598828569.

It is an arithmetic number, because the mean of its divisors is an integer number (598828569).

Almost surely, 2^1197657137 is an apocalyptic number.

It is an amenable number.

1197657137 is a deficient number, since it is larger than the sum of its proper divisors (1).

1197657137 is an equidigital number, since it uses as much as digits as its factorization.

1197657137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 277830, while the sum is 47.

The square root of 1197657137 is about 34607.1833150287. The cubic root of 1197657137 is about 1061.9665454425.

The spelling of 1197657137 in words is "one billion, one hundred ninety-seven million, six hundred fifty-seven thousand, one hundred thirty-seven".