77794381 has 8 divisors (see below), whose sum is σ = 90033920. Its totient is φ = 65836368.

The previous prime is 77794361. The next prime is 77794393. The reversal of 77794381 is 18349777.

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 77794381 - 2¹¹ = 77792333 is a prime.

It is a super-2 number, since 2×77794381² = 12103931430346322, 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 (77794331) 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, 69786 + ... + 70891.

It is an arithmetic number, because the mean of its divisors is an integer number (11254240).

Almost surely, 2^77794381 is an apocalyptic number.

It is an amenable number.

77794381 is a deficient number, since it is larger than the sum of its proper divisors (12239539).

77794381 is a wasteful number, since it uses less digits than its factorization.

77794381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140763.

The product of its digits is 296352, while the sum is 46.

The square root of 77794381 is about 8820.1123008724. The cubic root of 77794381 is about 426.8900934164.

The spelling of 77794381 in words is "seventy-seven million, seven hundred ninety-four thousand, three hundred eighty-one".