77973963 has 4 divisors (see below), whose sum is σ = 103965288. Its totient is φ = 51982640.

The previous prime is 77973949. The next prime is 77973983. The reversal of 77973963 is 36937977.

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

It is a cyclic number.

It is not a de Polignac number, because 77973963 - 2⁴ = 77973947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (77973943) 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, 12995658 + ... + 12995663.

It is an arithmetic number, because the mean of its divisors is an integer number (25991322).

Almost surely, 2^77973963 is an apocalyptic number.

77973963 is a deficient number, since it is larger than the sum of its proper divisors (25991325).

77973963 is a wasteful number, since it uses less digits than its factorization.

77973963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25991324.

The product of its digits is 1500282, while the sum is 51.

The square root of 77973963 is about 8830.2866884377. The cubic root of 77973963 is about 427.2183213344.

The spelling of 77973963 in words is "seventy-seven million, nine hundred seventy-three thousand, nine hundred sixty-three".