77772463 has 4 divisors (see below), whose sum is σ = 78018120. Its totient is φ = 77526808.

The previous prime is 77772421. The next prime is 77772469. The reversal of 77772463 is 36427777.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36427777 = 1999 ⋅18223.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77772463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77772469) 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, 122353 + ... + 122986.

It is an arithmetic number, because the mean of its divisors is an integer number (19504530).

Almost surely, 2^77772463 is an apocalyptic number.

77772463 is a deficient number, since it is larger than the sum of its proper divisors (245657).

77772463 is a wasteful number, since it uses less digits than its factorization.

77772463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245656.

The product of its digits is 345744, while the sum is 43.

The square root of 77772463 is about 8818.8697121570. The cubic root of 77772463 is about 426.8499985929.

The spelling of 77772463 in words is "seventy-seven million, seven hundred seventy-two thousand, four hundred sixty-three".