77648941 has 4 divisors (see below), whose sum is σ = 77675584. Its totient is φ = 77622300.

The previous prime is 77648939. The next prime is 77648981. The reversal of 77648941 is 14984677.

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, and also an emirpimes, since its reverse is a distinct semiprime: 14984677 = 29 ⋅516713.

It is a cyclic number.

It is not a de Polignac number, because 77648941 - 2¹ = 77648939 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77648891 and 77648900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77648981) 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 3 ways as a sum of consecutive naturals, for example, 8325 + ... + 14986.

It is an arithmetic number, because the mean of its divisors is an integer number (19418896).

It is a Poulet number, since it divides 2^77648940-1.

Almost surely, 2^77648941 is an apocalyptic number.

It is an amenable number.

77648941 is a deficient number, since it is larger than the sum of its proper divisors (26643).

77648941 is a wasteful number, since it uses less digits than its factorization.

77648941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26642.

The product of its digits is 338688, while the sum is 46.

The square root of 77648941 is about 8811.8636507835. The cubic root of 77648941 is about 426.6238975549.

The spelling of 77648941 in words is "seventy-seven million, six hundred forty-eight thousand, nine hundred forty-one".