76011721 has 4 divisors (see below), whose sum is σ = 78463744. Its totient is φ = 73559700.

The previous prime is 76011713. The next prime is 76011731. The reversal of 76011721 is 12711067.

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 not a de Polignac number, because 76011721 - 2³ = 76011713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76011731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1225965 + ... + 1226026.

It is an arithmetic number, because the mean of its divisors is an integer number (19615936).

Almost surely, 2^76011721 is an apocalyptic number.

It is an amenable number.

76011721 is a deficient number, since it is larger than the sum of its proper divisors (2452023).

76011721 is a wasteful number, since it uses less digits than its factorization.

76011721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2452022.

The product of its (nonzero) digits is 588, while the sum is 25.

The square root of 76011721 is about 8718.4701066185. The cubic root of 76011721 is about 423.6041327834.

Adding to 76011721 its reverse (12711067), we get a palindrome (88722788).

The spelling of 76011721 in words is "seventy-six million, eleven thousand, seven hundred twenty-one".