76390981 has 8 divisors (see below), whose sum is σ = 79804800. Its totient is φ = 72984912.

The previous prime is 76390973. The next prime is 76390987. The reversal of 76390981 is 18909367.

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 76390981 - 2³ = 76390973 is a prime.

It is a super-3 number, since 3×76390981³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a pancake number, because a pancake can be divided into 76390981 parts by 12360 straight cuts.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76390987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28695 + ... + 31243.

It is an arithmetic number, because the mean of its divisors is an integer number (9975600).

Almost surely, 2^76390981 is an apocalyptic number.

It is an amenable number.

76390981 is a deficient number, since it is larger than the sum of its proper divisors (3413819).

76390981 is a wasteful number, since it uses less digits than its factorization.

76390981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3875.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 76390981 is about 8740.1934189124. The cubic root of 76390981 is about 424.3074876606.

The spelling of 76390981 in words is "seventy-six million, three hundred ninety thousand, nine hundred eighty-one".