31290049 has 8 divisors (see below), whose sum is σ = 36726848. Its totient is φ = 26094960.

The previous prime is 31290029. The next prime is 31290059. The reversal of 31290049 is 94009213.

It is a happy number.

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 31290049 - 2¹³ = 31281857 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31289999 and 31290026.

It is not an unprimeable number, because it can be changed into a prime (31290029) 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, 60147 + ... + 60664.

It is an arithmetic number, because the mean of its divisors is an integer number (4590856).

Almost surely, 2^31290049 is an apocalyptic number.

It is an amenable number.

31290049 is a deficient number, since it is larger than the sum of its proper divisors (5436799).

31290049 is a wasteful number, since it uses less digits than its factorization.

31290049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120855.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 31290049 is about 5593.7508882681. The cubic root of 31290049 is about 315.1147612420.

The spelling of 31290049 in words is "thirty-one million, two hundred ninety thousand, forty-nine".