77962381 has 12 divisors (see below), whose sum is σ = 90911808. Its totient is φ = 66662232.

The previous prime is 77962373. The next prime is 77962421. The reversal of 77962381 is 18326977.

It is a happy number.

It is not a de Polignac number, because 77962381 - 2³ = 77962373 is a prime.

It is a super-2 number, since 2×77962381² = 12156265702378322, 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 (77962351) 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 11 ways as a sum of consecutive naturals, for example, 21180 + ... + 24586.

It is an arithmetic number, because the mean of its divisors is an integer number (7575984).

Almost surely, 2^77962381 is an apocalyptic number.

It is an amenable number.

77962381 is a deficient number, since it is larger than the sum of its proper divisors (12949427).

77962381 is a wasteful number, since it uses less digits than its factorization.

77962381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3888 (or 3881 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 77962381 is about 8829.6308529859. The cubic root of 77962381 is about 427.1971677449.

The spelling of 77962381 in words is "seventy-seven million, nine hundred sixty-two thousand, three hundred eighty-one".