76734321 has 4 divisors (see below), whose sum is σ = 102312432. Its totient is φ = 51156212.

The previous prime is 76734313. The next prime is 76734341. The reversal of 76734321 is 12343767.

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: 12343767 = 3 ⋅4114589.

It is a cyclic number.

It is not a de Polignac number, because 76734321 - 2³ = 76734313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (76734341) 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, 12789051 + ... + 12789056.

It is an arithmetic number, because the mean of its divisors is an integer number (25578108).

Almost surely, 2^76734321 is an apocalyptic number.

It is an amenable number.

76734321 is a deficient number, since it is larger than the sum of its proper divisors (25578111).

76734321 is a wasteful number, since it uses less digits than its factorization.

76734321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25578110.

The product of its digits is 21168, while the sum is 33.

The square root of 76734321 is about 8759.8128404664. The cubic root of 76734321 is about 424.9422223648.

The spelling of 76734321 in words is "seventy-six million, seven hundred thirty-four thousand, three hundred twenty-one".