1988083631 has 4 divisors (see below), whose sum is σ = 1988217000. Its totient is φ = 1987950264.

The previous prime is 1988083553. The next prime is 1988083633. The reversal of 1988083631 is 1363808891.

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 1988083631 - 2¹⁸ = 1987821487 is a prime.

It is a super-2 number, since 2×1988083631² = 7904953047700288322, which 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 (1988083633) 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, 41036 + ... + 75233.

It is an arithmetic number, because the mean of its divisors is an integer number (497054250).

Almost surely, 2^1988083631 is an apocalyptic number.

1988083631 is a deficient number, since it is larger than the sum of its proper divisors (133369).

1988083631 is a wasteful number, since it uses less digits than its factorization.

1988083631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133368.

The product of its (nonzero) digits is 248832, while the sum is 47.

The square root of 1988083631 is about 44587.9314501133. The cubic root of 1988083631 is about 1257.4137830055.

The spelling of 1988083631 in words is "one billion, nine hundred eighty-eight million, eighty-three thousand, six hundred thirty-one".