39489106831 has 4 divisors (see below), whose sum is σ = 40850800200. Its totient is φ = 38127413464.

The previous prime is 39489106807. The next prime is 39489106849. The reversal of 39489106831 is 13860198493.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 39489106831 - 2¹¹ = 39489104783 is a prime.

It is a super-2 number, since 2×39489106831² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39489106231) 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, 680846641 + ... + 680846698.

It is an arithmetic number, because the mean of its divisors is an integer number (10212700050).

Almost surely, 2^39489106831 is an apocalyptic number.

39489106831 is a deficient number, since it is larger than the sum of its proper divisors (1361693369).

39489106831 is a wasteful number, since it uses less digits than its factorization.

39489106831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1361693368.

The product of its (nonzero) digits is 1119744, while the sum is 52.

The spelling of 39489106831 in words is "thirty-nine billion, four hundred eighty-nine million, one hundred six thousand, eight hundred thirty-one".