913976981 has 4 divisors (see below), whose sum is σ = 915178764. Its totient is φ = 912775200.

The previous prime is 913976957. The next prime is 913977011. The reversal of 913976981 is 189679319.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29866225 + 884110756 = 5465^2 + 29734^2 .

It is a cyclic number.

It is not a de Polignac number, because 913976981 - 2¹⁰ = 913975957 is a prime.

It is a super-2 number, since 2×913976981² = 1670707843595748722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (913976381) 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, 599750 + ... + 601271.

It is an arithmetic number, because the mean of its divisors is an integer number (228794691).

Almost surely, 2^913976981 is an apocalyptic number.

It is an amenable number.

913976981 is a deficient number, since it is larger than the sum of its proper divisors (1201783).

913976981 is a wasteful number, since it uses less digits than its factorization.

913976981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1201782.

The product of its digits is 734832, while the sum is 53.

The square root of 913976981 is about 30232.0522128419. The cubic root of 913976981 is about 970.4617424706.

The spelling of 913976981 in words is "nine hundred thirteen million, nine hundred seventy-six thousand, nine hundred eighty-one".