818649967 has 4 divisors (see below), whose sum is σ = 823864456. Its totient is φ = 813435480.

The previous prime is 818649913. The next prime is 818649989. The reversal of 818649967 is 769946818.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 769946818 = 2 ⋅384973409.

It is a cyclic number.

It is not a de Polignac number, because 818649967 - 2¹⁵ = 818617199 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 (818649907) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2607009 + ... + 2607322.

It is an arithmetic number, because the mean of its divisors is an integer number (205966114).

Almost surely, 2^818649967 is an apocalyptic number.

818649967 is a deficient number, since it is larger than the sum of its proper divisors (5214489).

818649967 is a wasteful number, since it uses less digits than its factorization.

818649967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5214488.

The product of its digits is 5225472, while the sum is 58.

The square root of 818649967 is about 28612.0598174965. The cubic root of 818649967 is about 935.4762144656.

The spelling of 818649967 in words is "eight hundred eighteen million, six hundred forty-nine thousand, nine hundred sixty-seven".