76303021 has 8 divisors (see below), whose sum is σ = 81084024. Its totient is φ = 71554560.

The previous prime is 76303001. The next prime is 76303033. The reversal of 76303021 is 12030367.

It can be written as a sum of positive squares in 4 ways, for example, as 36120100 + 40182921 = 6010^2 + 6339^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 76303021 - 2¹⁹ = 75778733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 76302983 and 76303001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76303001) 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, 3210 + ... + 12763.

It is an arithmetic number, because the mean of its divisors is an integer number (10135503).

Almost surely, 2^76303021 is an apocalyptic number.

It is an amenable number.

76303021 is a deficient number, since it is larger than the sum of its proper divisors (4781003).

76303021 is a wasteful number, since it uses less digits than its factorization.

76303021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16271.

The product of its (nonzero) digits is 756, while the sum is 22.

The square root of 76303021 is about 8735.1600443266. The cubic root of 76303021 is about 424.1445695601.

Adding to 76303021 its reverse (12030367), we get a palindrome (88333388).

The spelling of 76303021 in words is "seventy-six million, three hundred three thousand, twenty-one".