961698981 has 4 divisors (see below), whose sum is σ = 1282265312. Its totient is φ = 641132652.

The previous prime is 961698979. The next prime is 961699033. The reversal of 961698981 is 189896169.

961698981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 961698981 - 2¹ = 961698979 is a prime.

It is a super-2 number, since 2×961698981² = 1849729860112876722, which contains 22 as substring.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (961698901) 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, 160283161 + ... + 160283166.

It is an arithmetic number, because the mean of its divisors is an integer number (320566328).

Almost surely, 2^961698981 is an apocalyptic number.

It is an amenable number.

961698981 is a deficient number, since it is larger than the sum of its proper divisors (320566331).

961698981 is a wasteful number, since it uses less digits than its factorization.

961698981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 320566330.

The product of its digits is 1679616, while the sum is 57.

The square root of 961698981 is about 31011.2718378334. The cubic root of 961698981 is about 987.0664377981.

The spelling of 961698981 in words is "nine hundred sixty-one million, six hundred ninety-eight thousand, nine hundred eighty-one".