77493541 has 4 divisors (see below), whose sum is σ = 77623084. Its totient is φ = 77364000.

The previous prime is 77493527. The next prime is 77493551. The reversal of 77493541 is 14539477.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 68062500 + 9431041 = 8250^2 + 3071^2 .

It is a cyclic number.

It is not a de Polignac number, because 77493541 - 2⁹ = 77493029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77493494 and 77493503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77493551) 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, 63870 + ... + 65071.

It is an arithmetic number, because the mean of its divisors is an integer number (19405771).

Almost surely, 2^77493541 is an apocalyptic number.

It is an amenable number.

77493541 is a deficient number, since it is larger than the sum of its proper divisors (129543).

77493541 is a wasteful number, since it uses less digits than its factorization.

77493541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129542.

The product of its digits is 105840, while the sum is 40.

The square root of 77493541 is about 8803.0415766370. The cubic root of 77493541 is about 426.3391045306.

The spelling of 77493541 in words is "seventy-seven million, four hundred ninety-three thousand, five hundred forty-one".