981340459 has 4 divisors (see below), whose sum is σ = 1070553240. Its totient is φ = 892127680.

The previous prime is 981340447. The next prime is 981340463. The reversal of 981340459 is 954043189.

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 981340459 - 2¹¹ = 981338411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981340429) 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, 44606374 + ... + 44606395.

It is an arithmetic number, because the mean of its divisors is an integer number (267638310).

Almost surely, 2^981340459 is an apocalyptic number.

981340459 is a deficient number, since it is larger than the sum of its proper divisors (89212781).

981340459 is a wasteful number, since it uses less digits than its factorization.

981340459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89212780.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 981340459 is about 31326.3540649084. The cubic root of 981340459 is about 993.7410604051.

The spelling of 981340459 in words is "nine hundred eighty-one million, three hundred forty thousand, four hundred fifty-nine".