76339981 has 8 divisors (see below), whose sum is σ = 78879744. Its totient is φ = 73841040.

The previous prime is 76339973. The next prime is 76339987. The reversal of 76339981 is 18993367.

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 76339981 - 2³ = 76339973 is a prime.

It is a super-2 number, since 2×76339981² = 11655585398160722, 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 (76339987) 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 7 ways as a sum of consecutive naturals, for example, 6381 + ... + 13906.

It is an arithmetic number, because the mean of its divisors is an integer number (9859968).

Almost surely, 2^76339981 is an apocalyptic number.

76339981 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

76339981 is a deficient number, since it is larger than the sum of its proper divisors (2539763).

76339981 is a wasteful number, since it uses less digits than its factorization.

76339981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20411.

The product of its digits is 244944, while the sum is 46.

The square root of 76339981 is about 8737.2753762257. The cubic root of 76339981 is about 424.2130415229.

The spelling of 76339981 in words is "seventy-six million, three hundred thirty-nine thousand, nine hundred eighty-one".