1231656193 has 2 divisors, whose sum is σ = 1231656194. Its totient is φ = 1231656192.

The previous prime is 1231656161. The next prime is 1231656203. The reversal of 1231656193 is 3916561321.

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., 1118701809 + 112954384 = 33447^2 + 10628^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231656193 - 2⁵ = 1231656161 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231656143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615828096 + 615828097.

It is an arithmetic number, because the mean of its divisors is an integer number (615828097).

Almost surely, 2^1231656193 is an apocalyptic number.

It is an amenable number.

1231656193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231656193 is an equidigital number, since it uses as much as digits as its factorization.

1231656193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 29160, while the sum is 37.

The square root of 1231656193 is about 35094.9596523489. The cubic root of 1231656193 is about 1071.9219519851.

The spelling of 1231656193 in words is "one billion, two hundred thirty-one million, six hundred fifty-six thousand, one hundred ninety-three".