120813431 has 2 divisors, whose sum is σ = 120813432. Its totient is φ = 120813430.

The previous prime is 120813409. The next prime is 120813461. The reversal of 120813431 is 134318021.

It is a weak prime.

It is an emirp because it is prime and its reverse (134318021) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 120813431 - 2¹⁰ = 120812407 is a prime.

It is a super-2 number, since 2×120813431² = 29191770219983522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 120813397 and 120813406.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120813401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60406715 + 60406716.

It is an arithmetic number, because the mean of its divisors is an integer number (60406716).

Almost surely, 2^120813431 is an apocalyptic number.

120813431 is a deficient number, since it is larger than the sum of its proper divisors (1).

120813431 is an equidigital number, since it uses as much as digits as its factorization.

120813431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 120813431 is about 10991.5163194165. The cubic root of 120813431 is about 494.3544023761.

The spelling of 120813431 in words is "one hundred twenty million, eight hundred thirteen thousand, four hundred thirty-one".