981356774 has 4 divisors (see below), whose sum is σ = 1472035164. Its totient is φ = 490678386.

The previous prime is 981356741. The next prime is 981356791. The reversal of 981356774 is 477653189.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×981356774² = 1926122235751374152, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 245339192 + ... + 245339195.

It is an arithmetic number, because the mean of its divisors is an integer number (368008791).

Almost surely, 2^981356774 is an apocalyptic number.

981356774 is a deficient number, since it is larger than the sum of its proper divisors (490678390).

981356774 is a wasteful number, since it uses less digits than its factorization.

981356774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490678389.

The product of its digits is 1270080, while the sum is 50.

The square root of 981356774 is about 31326.6144675737. The cubic root of 981356774 is about 993.7465674288.

The spelling of 981356774 in words is "nine hundred eighty-one million, three hundred fifty-six thousand, seven hundred seventy-four".