981298761 has 4 divisors (see below), whose sum is σ = 1308398352. Its totient is φ = 654199172.

The previous prime is 981298753. The next prime is 981298823. The reversal of 981298761 is 167892189.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 981298761 - 2³ = 981298753 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (981298751) 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, 163549791 + ... + 163549796.

It is an arithmetic number, because the mean of its divisors is an integer number (327099588).

Almost surely, 2^981298761 is an apocalyptic number.

It is an amenable number.

981298761 is a deficient number, since it is larger than the sum of its proper divisors (327099591).

981298761 is a wasteful number, since it uses less digits than its factorization.

981298761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327099590.

The product of its digits is 435456, while the sum is 51.

The square root of 981298761 is about 31325.6885159768. The cubic root of 981298761 is about 993.7269852350.

The spelling of 981298761 in words is "nine hundred eighty-one million, two hundred ninety-eight thousand, seven hundred sixty-one".