1231929269497 has 2 divisors, whose sum is σ = 1231929269498. Its totient is φ = 1231929269496.

The previous prime is 1231929269453. The next prime is 1231929269509. The reversal of 1231929269497 is 7949629291321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 785733325056 + 446195944441 = 886416^2 + 667979^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1231929269497 is a prime.

It is not a weakly prime, because it can be changed into another prime (1231929269447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615964634748 + 615964634749.

It is an arithmetic number, because the mean of its divisors is an integer number (615964634749).

Almost surely, 2^{1231929269497} is an apocalyptic number.

It is an amenable number.

1231929269497 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231929269497 is an equidigital number, since it uses as much as digits as its factorization.

1231929269497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26453952, while the sum is 64.

The spelling of 1231929269497 in words is "one trillion, two hundred thirty-one billion, nine hundred twenty-nine million, two hundred sixty-nine thousand, four hundred ninety-seven".