31377349 has 2 divisors, whose sum is σ = 31377350. Its totient is φ = 31377348.

The previous prime is 31377343. The next prime is 31377377. The reversal of 31377349 is 94377313.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17164449 + 14212900 = 4143^2 + 3770^2 .

It is a cyclic number.

It is not a de Polignac number, because 31377349 - 2⁵ = 31377317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31377343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15688674 + 15688675.

It is an arithmetic number, because the mean of its divisors is an integer number (15688675).

Almost surely, 2^31377349 is an apocalyptic number.

It is an amenable number.

31377349 is a deficient number, since it is larger than the sum of its proper divisors (1).

31377349 is an equidigital number, since it uses as much as digits as its factorization.

31377349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 37.

The square root of 31377349 is about 5601.5488036792. The cubic root of 31377349 is about 315.4075484064.

The spelling of 31377349 in words is "thirty-one million, three hundred seventy-seven thousand, three hundred forty-nine".