981969894 has 24 divisors (see below), whose sum is σ = 2239581240. Its totient is φ = 310095648.

The previous prime is 981969881. The next prime is 981969907. The reversal of 981969894 is 498969189.

It is an interprime number because it is at equal distance from previous prime (981969881) and next prime (981969907).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1435287 + ... + 1435970.

It is an arithmetic number, because the mean of its divisors is an integer number (93315885).

Almost surely, 2^981969894 is an apocalyptic number.

981969894 is an abundant number, since it is smaller than the sum of its proper divisors (1257611346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

981969894 is a wasteful number, since it uses less digits than its factorization.

981969894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2871284 (or 2871281 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The square root of 981969894 is about 31336.3988677704. The cubic root of 981969894 is about 993.9534779253.

The spelling of 981969894 in words is "nine hundred eighty-one million, nine hundred sixty-nine thousand, eight hundred ninety-four".