981356775 has 24 divisors (see below), whose sum is σ = 1854297984. Its totient is φ = 448620000.

The previous prime is 981356741. The next prime is 981356791. The reversal of 981356775 is 577653189.

It is not a de Polignac number, because 981356775 - 2⁶ = 981356711 is a prime.

It is a super-2 number, since 2×981356775² = 1926122239676801250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 934101 + ... + 935150.

It is an arithmetic number, because the mean of its divisors is an integer number (77262416).

Almost surely, 2^981356775 is an apocalyptic number.

981356775 is a deficient number, since it is larger than the sum of its proper divisors (872941209).

981356775 is a wasteful number, since it uses less digits than its factorization.

981356775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1869271 (or 1869266 counting only the distinct ones).

The product of its digits is 1587600, while the sum is 51.

The square root of 981356775 is about 31326.6144835346. The cubic root of 981356775 is about 993.7465677663.

The spelling of 981356775 in words is "nine hundred eighty-one million, three hundred fifty-six thousand, seven hundred seventy-five".