31144789 has 16 divisors (see below), whose sum is σ = 34884864. Its totient is φ = 27619200.

The previous prime is 31144759. The next prime is 31144823. The reversal of 31144789 is 98744113.

It is a cyclic number.

It is not a de Polignac number, because 31144789 - 2⁷ = 31144661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31144759) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37432 + ... + 38254.

It is an arithmetic number, because the mean of its divisors is an integer number (2180304).

Almost surely, 2^31144789 is an apocalyptic number.

It is an amenable number.

31144789 is a deficient number, since it is larger than the sum of its proper divisors (3740075).

31144789 is a wasteful number, since it uses less digits than its factorization.

31144789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 948.

The product of its digits is 24192, while the sum is 37.

The square root of 31144789 is about 5580.7516518835. The cubic root of 31144789 is about 314.6263782197.

The spelling of 31144789 in words is "thirty-one million, one hundred forty-four thousand, seven hundred eighty-nine".