31477349 has 2 divisors, whose sum is σ = 31477350. Its totient is φ = 31477348.

The previous prime is 31477321. The next prime is 31477351. The reversal of 31477349 is 94377413.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30360100 + 1117249 = 5510^2 + 1057^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31477349 is a prime.

Together with 31477351, 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 (31477379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15738674 + 15738675.

It is an arithmetic number, because the mean of its divisors is an integer number (15738675).

Almost surely, 2^31477349 is an apocalyptic number.

It is an amenable number.

31477349 is a deficient number, since it is larger than the sum of its proper divisors (1).

31477349 is an equidigital number, since it uses as much as digits as its factorization.

31477349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 63504, while the sum is 38.

The square root of 31477349 is about 5610.4678058073. The cubic root of 31477349 is about 315.7422623335.

The spelling of 31477349 in words is "thirty-one million, four hundred seventy-seven thousand, three hundred forty-nine".