76846921 has 4 divisors (see below), whose sum is σ = 77929344. Its totient is φ = 75764500.

The previous prime is 76846909. The next prime is 76846937. The reversal of 76846921 is 12964867.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-76846921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76846951) 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, 541105 + ... + 541246.

It is an arithmetic number, because the mean of its divisors is an integer number (19482336).

Almost surely, 2^76846921 is an apocalyptic number.

76846921 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

76846921 is a deficient number, since it is larger than the sum of its proper divisors (1082423).

76846921 is a wasteful number, since it uses less digits than its factorization.

76846921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082422.

The product of its digits is 145152, while the sum is 43.

The square root of 76846921 is about 8766.2375623753. The cubic root of 76846921 is about 425.1499742910.

The spelling of 76846921 in words is "seventy-six million, eight hundred forty-six thousand, nine hundred twenty-one".