121683431 has 2 divisors, whose sum is σ = 121683432. Its totient is φ = 121683430.

The previous prime is 121683413. The next prime is 121683437. The reversal of 121683431 is 134386121.

Together with previous prime (121683413) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121683431 is a prime.

It is a super-2 number, since 2×121683431² = 29613714759863522, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 121683394 and 121683403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121683437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60841715 + 60841716.

It is an arithmetic number, because the mean of its divisors is an integer number (60841716).

Almost surely, 2^121683431 is an apocalyptic number.

121683431 is a deficient number, since it is larger than the sum of its proper divisors (1).

121683431 is an equidigital number, since it uses as much as digits as its factorization.

121683431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 29.

The square root of 121683431 is about 11031.0213035784. The cubic root of 121683431 is about 495.5382113145.

The spelling of 121683431 in words is "one hundred twenty-one million, six hundred eighty-three thousand, four hundred thirty-one".