31406949 has 12 divisors (see below), whose sum is σ = 51846496. Its totient is φ = 17946792.

The previous prime is 31406923. The next prime is 31406953. The reversal of 31406949 is 94960413.

It is not a de Polignac number, because 31406949 - 2⁵ = 31406917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31406909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 249199 + ... + 249324.

Almost surely, 2^31406949 is an apocalyptic number.

It is an amenable number.

31406949 is a deficient number, since it is larger than the sum of its proper divisors (20439547).

31406949 is a wasteful number, since it uses less digits than its factorization.

31406949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498536 (or 498533 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 31406949 is about 5604.1903072612. The cubic root of 31406949 is about 315.5066977346.

The spelling of 31406949 in words is "thirty-one million, four hundred six thousand, nine hundred forty-nine".