276603813 has 12 divisors (see below), whose sum is σ = 401301888. Its totient is φ = 183588840.

The previous prime is 276603809. The next prime is 276603839. The reversal of 276603813 is 318306672.

It is a happy number.

276603813 is a `hidden beast` number, since 276 + 6 + 0 + 381 + 3 = 666.

It is not a de Polignac number, because 276603813 - 2² = 276603809 is a prime.

It is a super-2 number, since 2×276603813² = 153019338732277938, which contains 22 as substring.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (276603893) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 65653 + ... + 69738.

It is an arithmetic number, because the mean of its divisors is an integer number (33441824).

Almost surely, 2^276603813 is an apocalyptic number.

It is an amenable number.

276603813 is a deficient number, since it is larger than the sum of its proper divisors (124698075).

276603813 is a wasteful number, since it uses less digits than its factorization.

276603813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135624 (or 135621 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 36.

The square root of 276603813 is about 16631.4104332735. The cubic root of 276603813 is about 651.5574588951.

The spelling of 276603813 in words is "two hundred seventy-six million, six hundred three thousand, eight hundred thirteen".