31400029 has 2 divisors, whose sum is σ = 31400030. Its totient is φ = 31400028.

The previous prime is 31400023. The next prime is 31400053. The reversal of 31400029 is 92000413.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30802500 + 597529 = 5550^2 + 773^2 .

It is a cyclic number.

It is not a de Polignac number, because 31400029 - 2³ = 31400021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31399979 and 31400015.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31400021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15700014 + 15700015.

It is an arithmetic number, because the mean of its divisors is an integer number (15700015).

Almost surely, 2^31400029 is an apocalyptic number.

It is an amenable number.

31400029 is a deficient number, since it is larger than the sum of its proper divisors (1).

31400029 is an equidigital number, since it uses as much as digits as its factorization.

31400029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 31400029 is about 5603.5728780841. The cubic root of 31400029 is about 315.4835238109.

The spelling of 31400029 in words is "thirty-one million, four hundred thousand, twenty-nine".