31049497 has 8 divisors (see below), whose sum is σ = 32938056. Its totient is φ = 29167872.

The previous prime is 31049479. The next prime is 31049537. The reversal of 31049497 is 79494013.

It can be written as a sum of positive squares in 4 ways, for example, as 7778521 + 23270976 = 2789^2 + 4824^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31049497 - 2²³ = 22660889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31049407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9703 + ... + 12499.

It is an arithmetic number, because the mean of its divisors is an integer number (4117257).

Almost surely, 2^31049497 is an apocalyptic number.

It is an amenable number.

31049497 is a deficient number, since it is larger than the sum of its proper divisors (1888559).

31049497 is a wasteful number, since it uses less digits than its factorization.

31049497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3467.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 31049497 is about 5572.2075517698. The cubic root of 31049497 is about 314.3051687190.

The spelling of 31049497 in words is "thirty-one million, forty-nine thousand, four hundred ninety-seven".