1231735523 has 2 divisors, whose sum is σ = 1231735524. Its totient is φ = 1231735522.

The previous prime is 1231735511. The next prime is 1231735579. The reversal of 1231735523 is 3255371321.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1231735523 - 2¹² = 1231731427 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1231735523.

It is not a weakly prime, because it can be changed into another prime (1231737523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615867761 + 615867762.

It is an arithmetic number, because the mean of its divisors is an integer number (615867762).

Almost surely, 2^1231735523 is an apocalyptic number.

1231735523 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231735523 is an equidigital number, since it uses as much as digits as its factorization.

1231735523 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18900, while the sum is 32.

The square root of 1231735523 is about 35096.0898534295. The cubic root of 1231735523 is about 1071.9449653724.

The spelling of 1231735523 in words is "one billion, two hundred thirty-one million, seven hundred thirty-five thousand, five hundred twenty-three".