31419729 has 12 divisors (see below), whose sum is σ = 49510032. Its totient is φ = 19042200.

The previous prime is 31419721. The next prime is 31419761. The reversal of 31419729 is 92791413.

It is not a de Polignac number, because 31419729 - 2³ = 31419721 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31419693 and 31419702.

It is not an unprimeable number, because it can be changed into a prime (31419721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 158587 + ... + 158784.

It is an arithmetic number, because the mean of its divisors is an integer number (4125836).

Almost surely, 2^31419729 is an apocalyptic number.

It is an amenable number.

31419729 is a deficient number, since it is larger than the sum of its proper divisors (18090303).

31419729 is a wasteful number, since it uses less digits than its factorization.

31419729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317388 (or 317385 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 31419729 is about 5605.3304095298. The cubic root of 31419729 is about 315.5494868724.

The spelling of 31419729 in words is "thirty-one million, four hundred nineteen thousand, seven hundred twenty-nine".