981961327 has 4 divisors (see below), whose sum is σ = 1039723776. Its totient is φ = 924198880.

The previous prime is 981961303. The next prime is 981961349. The reversal of 981961327 is 723169189.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 723169189 = 487 ⋅1484947.

It is a de Polignac number, because none of the positive numbers 2^k-981961327 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981961427) 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 3 ways as a sum of consecutive naturals, for example, 28881199 + ... + 28881232.

It is an arithmetic number, because the mean of its divisors is an integer number (259930944).

Almost surely, 2^981961327 is an apocalyptic number.

981961327 is a deficient number, since it is larger than the sum of its proper divisors (57762449).

981961327 is a wasteful number, since it uses less digits than its factorization.

981961327 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57762448.

The product of its digits is 163296, while the sum is 46.

The square root of 981961327 is about 31336.2621733990. The cubic root of 981961327 is about 993.9505874007.

The spelling of 981961327 in words is "nine hundred eighty-one million, nine hundred sixty-one thousand, three hundred twenty-seven".