31742449 has 2 divisors, whose sum is σ = 31742450. Its totient is φ = 31742448.

The previous prime is 31742441. The next prime is 31742453. The reversal of 31742449 is 94424713.

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., 29160000 + 2582449 = 5400^2 + 1607^2 .

It is a cyclic number.

It is not a de Polignac number, because 31742449 - 2³ = 31742441 is a prime.

It is not a weakly prime, because it can be changed into another prime (31742441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15871224 + 15871225.

It is an arithmetic number, because the mean of its divisors is an integer number (15871225).

Almost surely, 2^31742449 is an apocalyptic number.

It is an amenable number.

31742449 is a deficient number, since it is larger than the sum of its proper divisors (1).

31742449 is an equidigital number, since it uses as much as digits as its factorization.

31742449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 34.

The square root of 31742449 is about 5634.0437520488. The cubic root of 31742449 is about 316.6261718609.

The spelling of 31742449 in words is "thirty-one million, seven hundred forty-two thousand, four hundred forty-nine".