612400031 has 2 divisors, whose sum is σ = 612400032. Its totient is φ = 612400030.

The previous prime is 612400007. The next prime is 612400043. The reversal of 612400031 is 130004216.

612400031 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 612400031 - 2⁶ = 612399967 is a prime.

It is a super-2 number, since 2×612400031² = 750067595937601922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 612399982 and 612400009.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612400081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306200015 + 306200016.

It is an arithmetic number, because the mean of its divisors is an integer number (306200016).

Almost surely, 2^612400031 is an apocalyptic number.

612400031 is a deficient number, since it is larger than the sum of its proper divisors (1).

612400031 is an equidigital number, since it uses as much as digits as its factorization.

612400031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 612400031 is about 24746.7175803176. The cubic root of 612400031 is about 849.2034202677.

Adding to 612400031 its reverse (130004216), we get a palindrome (742404247).

The spelling of 612400031 in words is "six hundred twelve million, four hundred thousand, thirty-one".