77264399 has 4 divisors (see below), whose sum is σ = 79352664. Its totient is φ = 75176136.

The previous prime is 77264353. The next prime is 77264413. The reversal of 77264399 is 99346277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99346277 = 223 ⋅445499.

It is a cyclic number.

It is not a de Polignac number, because 77264399 - 2¹² = 77260303 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 (77264329) 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, 1044077 + ... + 1044150.

It is an arithmetic number, because the mean of its divisors is an integer number (19838166).

Almost surely, 2^77264399 is an apocalyptic number.

77264399 is a deficient number, since it is larger than the sum of its proper divisors (2088265).

77264399 is a wasteful number, since it uses less digits than its factorization.

77264399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2088264.

The product of its digits is 571536, while the sum is 47.

The square root of 77264399 is about 8790.0170079471. The cubic root of 77264399 is about 425.9184731611.

The spelling of 77264399 in words is "seventy-seven million, two hundred sixty-four thousand, three hundred ninety-nine".