981440761 has 8 divisors (see below), whose sum is σ = 1121916224. Its totient is φ = 841032720.

The previous prime is 981440743. The next prime is 981440783. The reversal of 981440761 is 167044189.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 981440761 - 2⁹ = 981440249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (981440741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19606 + ... + 48448.

It is an arithmetic number, because the mean of its divisors is an integer number (140239528).

Almost surely, 2^981440761 is an apocalyptic number.

It is an amenable number.

981440761 is a deficient number, since it is larger than the sum of its proper divisors (140475463).

981440761 is a wasteful number, since it uses less digits than its factorization.

981440761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33711.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 981440761 is about 31327.9549444262. The cubic root of 981440761 is about 993.7749157367.

The spelling of 981440761 in words is "nine hundred eighty-one million, four hundred forty thousand, seven hundred sixty-one".