77860349 has 4 divisors (see below), whose sum is σ = 88983264. Its totient is φ = 66737436.

The previous prime is 77860333. The next prime is 77860379. The reversal of 77860349 is 94306877.

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 77860349 - 2⁴ = 77860333 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 (77860379) 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, 5561447 + ... + 5561460.

It is an arithmetic number, because the mean of its divisors is an integer number (22245816).

Almost surely, 2^77860349 is an apocalyptic number.

It is an amenable number.

77860349 is a deficient number, since it is larger than the sum of its proper divisors (11122915).

77860349 is a wasteful number, since it uses less digits than its factorization.

77860349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11122914.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 77860349 is about 8823.8511433501. The cubic root of 77860349 is about 427.0107239344.

The spelling of 77860349 in words is "seventy-seven million, eight hundred sixty thousand, three hundred forty-nine".