78750077 has 4 divisors (see below), whose sum is σ = 90000096. Its totient is φ = 67500060.

The previous prime is 78750059. The next prime is 78750083. The reversal of 78750077 is 77005787.

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 78750077 - 2¹² = 78745981 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 (78750037) 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, 5624999 + ... + 5625012.

It is an arithmetic number, because the mean of its divisors is an integer number (22500024).

Almost surely, 2^78750077 is an apocalyptic number.

It is an amenable number.

78750077 is a deficient number, since it is larger than the sum of its proper divisors (11250019).

78750077 is a wasteful number, since it uses less digits than its factorization.

78750077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11250018.

The product of its (nonzero) digits is 96040, while the sum is 41.

The square root of 78750077 is about 8874.1240131069. The cubic root of 78750077 is about 428.6310838176.

The spelling of 78750077 in words is "seventy-eight million, seven hundred fifty thousand, seventy-seven".