31489449 has 4 divisors (see below), whose sum is σ = 41985936. Its totient is φ = 20992964.

The previous prime is 31489433. The next prime is 31489463. The reversal of 31489449 is 94498413.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31489449 - 2⁴ = 31489433 is a prime.

It is a super-4 number, since 4×31489449⁴ (a number of 31 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31489449.

It is not an unprimeable number, because it can be changed into a prime (31489489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5248239 + ... + 5248244.

It is an arithmetic number, because the mean of its divisors is an integer number (10496484).

Almost surely, 2^31489449 is an apocalyptic number.

It is an amenable number.

31489449 is a deficient number, since it is larger than the sum of its proper divisors (10496487).

31489449 is a wasteful number, since it uses less digits than its factorization.

31489449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10496486.

The product of its digits is 124416, while the sum is 42.

The square root of 31489449 is about 5611.5460436496. The cubic root of 31489449 is about 315.7827146170.

The spelling of 31489449 in words is "thirty-one million, four hundred eighty-nine thousand, four hundred forty-nine".