77649027 has 4 divisors (see below), whose sum is σ = 103532040. Its totient is φ = 51766016.

The previous prime is 77648993. The next prime is 77649031. The reversal of 77649027 is 72094677.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 72094677 = 3 ⋅24031559.

It is a cyclic number.

It is not a de Polignac number, because 77649027 - 2⁷ = 77648899 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77649027.

It is not an unprimeable number, because it can be changed into a prime (77649097) 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, 12941502 + ... + 12941507.

It is an arithmetic number, because the mean of its divisors is an integer number (25883010).

Almost surely, 2^77649027 is an apocalyptic number.

77649027 is a deficient number, since it is larger than the sum of its proper divisors (25883013).

77649027 is a wasteful number, since it uses less digits than its factorization.

77649027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25883012.

The product of its (nonzero) digits is 148176, while the sum is 42.

The square root of 77649027 is about 8811.8685305672. The cubic root of 77649027 is about 426.6240550571.

The spelling of 77649027 in words is "seventy-seven million, six hundred forty-nine thousand, twenty-seven".