813462981 has 8 divisors (see below), whose sum is σ = 1107694464. Its totient is φ = 530770080.

The previous prime is 813462977. The next prime is 813463003. The reversal of 813462981 is 189264318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 813462981 - 2² = 813462977 is a prime.

It is a super-2 number, since 2×813462981² = 1323444042914812722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813462281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2884480 + ... + 2884761.

It is an arithmetic number, because the mean of its divisors is an integer number (138461808).

Almost surely, 2^813462981 is an apocalyptic number.

It is an amenable number.

813462981 is a deficient number, since it is larger than the sum of its proper divisors (294231483).

813462981 is a wasteful number, since it uses less digits than its factorization.

813462981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5769291.

The product of its digits is 82944, while the sum is 42.

The square root of 813462981 is about 28521.2724295393. The cubic root of 813462981 is about 933.4962936401.

The spelling of 813462981 in words is "eight hundred thirteen million, four hundred sixty-two thousand, nine hundred eighty-one".