989613431 has 16 divisors (see below), whose sum is σ = 1031184000. Its totient is φ = 949135200.

The previous prime is 989613389. The next prime is 989613437. The reversal of 989613431 is 134316989.

It is a cyclic number.

It is not a de Polignac number, because 989613431 - 2¹⁸ = 989351287 is a prime.

It is a super-2 number, since 2×989613431² = 1958669485631183522, 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 (989613437) 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, 470420 + ... + 472518.

It is an arithmetic number, because the mean of its divisors is an integer number (64449000).

Almost surely, 2^989613431 is an apocalyptic number.

989613431 is a deficient number, since it is larger than the sum of its proper divisors (41570569).

989613431 is a wasteful number, since it uses less digits than its factorization.

989613431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2350.

The product of its digits is 139968, while the sum is 44.

The square root of 989613431 is about 31458.1218606579. The cubic root of 989613431 is about 996.5257539260.

The spelling of 989613431 in words is "nine hundred eighty-nine million, six hundred thirteen thousand, four hundred thirty-one".