77606149 has 4 divisors (see below), whose sum is σ = 77625280. Its totient is φ = 77587020.

The previous prime is 77606129. The next prime is 77606171. The reversal of 77606149 is 94160677.

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, and also an emirpimes, since its reverse is a distinct semiprime: 94160677 = 13 ⋅7243129.

It is a cyclic number.

It is not a de Polignac number, because 77606149 - 2⁹ = 77605637 is a prime.

It is a super-2 number, since 2×77606149² = 12045428725220402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77606119) 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, 807 + ... + 12484.

It is an arithmetic number, because the mean of its divisors is an integer number (19406320).

Almost surely, 2^77606149 is an apocalyptic number.

It is an amenable number.

77606149 is a deficient number, since it is larger than the sum of its proper divisors (19131).

77606149 is a wasteful number, since it uses less digits than its factorization.

77606149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19130.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 77606149 is about 8809.4352259382. The cubic root of 77606149 is about 426.5455129509.

The spelling of 77606149 in words is "seventy-seven million, six hundred six thousand, one hundred forty-nine".