840157919 has 8 divisors (see below), whose sum is σ = 849132960. Its totient is φ = 831198816.

The previous prime is 840157891. The next prime is 840157931. The reversal of 840157919 is 919751048.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 840157919 - 2²⁰ = 839109343 is a prime.

It is a super-2 number, since 2×840157919² = 1411730657716821122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 840157919.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840154919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123269 + ... + 129905.

It is an arithmetic number, because the mean of its divisors is an integer number (106141620).

Almost surely, 2^840157919 is an apocalyptic number.

840157919 is a deficient number, since it is larger than the sum of its proper divisors (8975041).

840157919 is a wasteful number, since it uses less digits than its factorization.

840157919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7969.

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 840157919 is about 28985.4777259234. The cubic root of 840157919 is about 943.5979204152.

The spelling of 840157919 in words is "eight hundred forty million, one hundred fifty-seven thousand, nine hundred nineteen".