76734409 has 4 divisors (see below), whose sum is σ = 78367104. Its totient is φ = 75101716.

The previous prime is 76734391. The next prime is 76734419. The reversal of 76734409 is 90443767.

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: 90443767 = 593 ⋅152519.

It is a cyclic number.

It is not a de Polignac number, because 76734409 - 2²¹ = 74637257 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a zygodrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (76734419) 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, 816277 + ... + 816370.

It is an arithmetic number, because the mean of its divisors is an integer number (19591776).

Almost surely, 2^76734409 is an apocalyptic number.

It is an amenable number.

76734409 is a deficient number, since it is larger than the sum of its proper divisors (1632695).

76734409 is a wasteful number, since it uses less digits than its factorization.

76734409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632694.

The product of its (nonzero) digits is 127008, while the sum is 40.

The square root of 76734409 is about 8759.8178634033. The cubic root of 76734409 is about 424.9423848080.

The spelling of 76734409 in words is "seventy-six million, seven hundred thirty-four thousand, four hundred nine".