77032649 has 4 divisors (see below), whose sum is σ = 77055636. Its totient is φ = 77009664.

The previous prime is 77032643. The next prime is 77032667. The reversal of 77032649 is 94623077.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94623077 = 3529 ⋅26813.

It can be written as a sum of positive squares in 2 ways, for example, as 44622400 + 32410249 = 6680^2 + 5693^2 .

It is a cyclic number.

It is not a de Polignac number, because 77032649 - 2⁴ = 77032633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77032643) 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, 5384 + ... + 13529.

It is an arithmetic number, because the mean of its divisors is an integer number (19263909).

Almost surely, 2^77032649 is an apocalyptic number.

It is an amenable number.

77032649 is a deficient number, since it is larger than the sum of its proper divisors (22987).

77032649 is a wasteful number, since it uses less digits than its factorization.

77032649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22986.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 77032649 is about 8776.8245396613. The cubic root of 77032649 is about 425.4922075915.

The spelling of 77032649 in words is "seventy-seven million, thirty-two thousand, six hundred forty-nine".