76994221 has 4 divisors (see below), whose sum is σ = 77700700. Its totient is φ = 76287744.

The previous prime is 76994171. The next prime is 76994231. The reversal of 76994221 is 12249967.

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 47073321 + 29920900 = 6861^2 + 5470^2 .

It is a cyclic number.

It is not a de Polignac number, because 76994221 - 2¹¹ = 76992173 is a prime.

It is a super-2 number, since 2×76994221² = 11856220134793682, 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 (76994231) 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, 353076 + ... + 353293.

It is an arithmetic number, because the mean of its divisors is an integer number (19425175).

Almost surely, 2^76994221 is an apocalyptic number.

It is an amenable number.

76994221 is a deficient number, since it is larger than the sum of its proper divisors (706479).

76994221 is a wasteful number, since it uses less digits than its factorization.

76994221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706478.

The product of its digits is 54432, while the sum is 40.

The square root of 76994221 is about 8774.6350921278. The cubic root of 76994221 is about 425.4214430763.

The spelling of 76994221 in words is "seventy-six million, nine hundred ninety-four thousand, two hundred twenty-one".