981699951 has 16 divisors (see below), whose sum is σ = 1338660864. Its totient is φ = 639642144.

The previous prime is 981699931. The next prime is 981699989. The reversal of 981699951 is 159996189.

It is not a de Polignac number, because 981699951 - 2⁵ = 981699919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 981699891 and 981699900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981699931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104490 + ... + 113496.

It is an arithmetic number, because the mean of its divisors is an integer number (83666304).

Almost surely, 2^981699951 is an apocalyptic number.

981699951 is a deficient number, since it is larger than the sum of its proper divisors (356960913).

981699951 is a wasteful number, since it uses less digits than its factorization.

981699951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9830.

The product of its digits is 1574640, while the sum is 57.

The square root of 981699951 is about 31332.0913920536. The cubic root of 981699951 is about 993.8623904845.

The spelling of 981699951 in words is "nine hundred eighty-one million, six hundred ninety-nine thousand, nine hundred fifty-one".