1231031741 has 2 divisors, whose sum is σ = 1231031742. Its totient is φ = 1231031740.

The previous prime is 1231031729. The next prime is 1231031743. The reversal of 1231031741 is 1471301321.

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., 1153960900 + 77070841 = 33970^2 + 8779^2 .

It is a cyclic number.

It is not a de Polignac number, because 1231031741 - 2³⁰ = 157289917 is a prime.

Together with 1231031743, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231031743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615515870 + 615515871.

It is an arithmetic number, because the mean of its divisors is an integer number (615515871).

Almost surely, 2^1231031741 is an apocalyptic number.

It is an amenable number.

1231031741 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231031741 is an equidigital number, since it uses as much as digits as its factorization.

1231031741 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 1231031741 is about 35086.0619192294. The cubic root of 1231031741 is about 1071.7407658810.

The spelling of 1231031741 in words is "one billion, two hundred thirty-one million, thirty-one thousand, seven hundred forty-one".