1002689431 has 4 divisors (see below), whose sum is σ = 1006389664. Its totient is φ = 998989200.

The previous prime is 1002689423. The next prime is 1002689459. The reversal of 1002689431 is 1349862001.

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 1002689431 - 2³ = 1002689423 is a prime.

It is a super-2 number, since 2×1002689431² = 2010772190078207522, 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 (1002689411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1849710 + ... + 1850251.

It is an arithmetic number, because the mean of its divisors is an integer number (251597416).

Almost surely, 2^1002689431 is an apocalyptic number.

1002689431 is a deficient number, since it is larger than the sum of its proper divisors (3700233).

1002689431 is an equidigital number, since it uses as much as digits as its factorization.

1002689431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3700232.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 1002689431 is about 31665.2716868180. The cubic root of 1002689431 is about 1000.8956745276.

The spelling of 1002689431 in words is "one billion, two million, six hundred eighty-nine thousand, four hundred thirty-one".