77264321 has 4 divisors (see below), whose sum is σ = 77418432. Its totient is φ = 77110212.

The previous prime is 77264311. The next prime is 77264329. The reversal of 77264321 is 12346277.

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: 12346277 = 31 ⋅398267.

It is a cyclic number.

It is not a de Polignac number, because 77264321 - 2¹⁰ = 77263297 is a prime.

It is a Duffinian 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, 76301 + ... + 77306.

It is an arithmetic number, because the mean of its divisors is an integer number (19354608).

Almost surely, 2^77264321 is an apocalyptic number.

It is an amenable number.

77264321 is a deficient number, since it is larger than the sum of its proper divisors (154111).

77264321 is a wasteful number, since it uses less digits than its factorization.

77264321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154110.

The product of its digits is 14112, while the sum is 32.

The square root of 77264321 is about 8790.0125710945. The cubic root of 77264321 is about 425.9183298366.

The spelling of 77264321 in words is "seventy-seven million, two hundred sixty-four thousand, three hundred twenty-one".