31180949 has 2 divisors, whose sum is σ = 31180950. Its totient is φ = 31180948.

The previous prime is 31180931. The next prime is 31180987. The reversal of 31180949 is 94908113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19518724 + 11662225 = 4418^2 + 3415^2 .

It is a cyclic number.

It is not a de Polignac number, because 31180949 - 2²⁴ = 14403733 is a prime.

It is a Chen prime.

It is a plaindrome in base 11.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31180909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15590474 + 15590475.

It is an arithmetic number, because the mean of its divisors is an integer number (15590475).

Almost surely, 2^31180949 is an apocalyptic number.

It is an amenable number.

31180949 is a deficient number, since it is larger than the sum of its proper divisors (1).

31180949 is an equidigital number, since it uses as much as digits as its factorization.

31180949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 31180949 is about 5583.9904190462. The cubic root of 31180949 is about 314.7480945653.

The spelling of 31180949 in words is "thirty-one million, one hundred eighty thousand, nine hundred forty-nine".