77393077 has 4 divisors (see below), whose sum is σ = 79192960. Its totient is φ = 75593196.

The previous prime is 77393059. The next prime is 77393093. The reversal of 77393077 is 77039377.

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 a de Polignac number, because none of the positive numbers 2^k-77393077 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43), and also a Moran number because the ratio is a prime number: 1799839 = 77393077 / (7 + 7 + 3 + 9 + 3 + 0 + 7 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77393177) 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, 899877 + ... + 899962.

It is an arithmetic number, because the mean of its divisors is an integer number (19798240).

Almost surely, 2^77393077 is an apocalyptic number.

It is an amenable number.

77393077 is a deficient number, since it is larger than the sum of its proper divisors (1799883).

77393077 is a wasteful number, since it uses less digits than its factorization.

77393077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1799882.

The product of its (nonzero) digits is 194481, while the sum is 43.

The square root of 77393077 is about 8797.3335164696. Note that the first 3 decimals coincide. The cubic root of 77393077 is about 426.1547869997.

It can be divided in two parts, 7739 and 3077, that added together give a square (10816 = 104²).

The spelling of 77393077 in words is "seventy-seven million, three hundred ninety-three thousand, seventy-seven".