31948949 has 2 divisors, whose sum is σ = 31948950. Its totient is φ = 31948948.

The previous prime is 31948921. The next prime is 31948951. The reversal of 31948949 is 94984913.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30448324 + 1500625 = 5518^2 + 1225^2 .

It is a cyclic number.

It is not a de Polignac number, because 31948949 - 2¹⁶ = 31883413 is a prime.

Together with 31948951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31948999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15974474 + 15974475.

It is an arithmetic number, because the mean of its divisors is an integer number (15974475).

Almost surely, 2^31948949 is an apocalyptic number.

It is an amenable number.

31948949 is a deficient number, since it is larger than the sum of its proper divisors (1).

31948949 is an equidigital number, since it uses as much as digits as its factorization.

31948949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 47.

The square root of 31948949 is about 5652.3401348468. The cubic root of 31948949 is about 317.3112905102.

The spelling of 31948949 in words is "thirty-one million, nine hundred forty-eight thousand, nine hundred forty-nine".