764742019 has 4 divisors (see below), whose sum is σ = 797991696. Its totient is φ = 731492344.

The previous prime is 764741969. The next prime is 764742049. The reversal of 764742019 is 910247467.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 910247467 = 953 ⋅955139.

It is a cyclic number.

It is not a de Polignac number, because 764742019 - 2⁷ = 764741891 is a prime.

It is a super-2 number, since 2×764742019² = 1169660711248392722, which contains 22 as substring.

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 not an unprimeable number, because it can be changed into a prime (764742049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16624804 + ... + 16624849.

It is an arithmetic number, because the mean of its divisors is an integer number (199497924).

Almost surely, 2^764742019 is an apocalyptic number.

764742019 is a deficient number, since it is larger than the sum of its proper divisors (33249677).

764742019 is a wasteful number, since it uses less digits than its factorization.

764742019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33249676.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 764742019 is about 27653.9693172608. The cubic root of 764742019 is about 914.4746081498.

The spelling of 764742019 in words is "seven hundred sixty-four million, seven hundred forty-two thousand, nineteen".