840100769 has 4 divisors (see below), whose sum is σ = 840381696. Its totient is φ = 839819844.

The previous prime is 840100741. The next prime is 840100771. The reversal of 840100769 is 967001048.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-840100769 is a prime.

It is a super-2 number, since 2×840100769² = 1411538604148782722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (840100669) 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, 135929 + ... + 141974.

It is an arithmetic number, because the mean of its divisors is an integer number (210095424).

Almost surely, 2^840100769 is an apocalyptic number.

It is an amenable number.

840100769 is a deficient number, since it is larger than the sum of its proper divisors (280927).

840100769 is a wasteful number, since it uses less digits than its factorization.

840100769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280926.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 840100769 is about 28984.4918706539. The cubic root of 840100769 is about 943.5765244995.

The spelling of 840100769 in words is "eight hundred forty million, one hundred thousand, seven hundred sixty-nine".