981709494 has 16 divisors (see below), whose sum is σ = 2011307760. Its totient is φ = 319255040.

The previous prime is 981709471. The next prime is 981709501. The reversal of 981709494 is 494907189.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1995099 + ... + 1995590.

It is an arithmetic number, because the mean of its divisors is an integer number (125706735).

Almost surely, 2^981709494 is an apocalyptic number.

981709494 is an abundant number, since it is smaller than the sum of its proper divisors (1029598266).

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

981709494 is a wasteful number, since it uses less digits than its factorization.

981709494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3990735.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 981709494 is about 31332.2436796346. The cubic root of 981709494 is about 993.8656108840.

The spelling of 981709494 in words is "nine hundred eighty-one million, seven hundred nine thousand, four hundred ninety-four".