77994541 has 4 divisors (see below), whose sum is σ = 81385632. Its totient is φ = 74603452.

The previous prime is 77994533. The next prime is 77994551. The reversal of 77994541 is 14549977.

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.

It is a cyclic number.

It is not a de Polignac number, because 77994541 - 2³ = 77994533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77994491 and 77994500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77994551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1695511 + ... + 1695556.

It is an arithmetic number, because the mean of its divisors is an integer number (20346408).

Almost surely, 2^77994541 is an apocalyptic number.

It is an amenable number.

77994541 is a deficient number, since it is larger than the sum of its proper divisors (3391091).

77994541 is a wasteful number, since it uses less digits than its factorization.

77994541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3391090.

The product of its digits is 317520, while the sum is 46.

The square root of 77994541 is about 8831.4518059037. The cubic root of 77994541 is about 427.2559002262.

The spelling of 77994541 in words is "seventy-seven million, nine hundred ninety-four thousand, five hundred forty-one".