919140649 has 8 divisors (see below), whose sum is σ = 1112237568. Its totient is φ = 741491520.

The previous prime is 919140623. The next prime is 919140659. The reversal of 919140649 is 946041919.

It is a happy number.

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

It is not a de Polignac number, because 919140649 - 2⁵ = 919140617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (919140659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3861817 + ... + 3862054.

It is an arithmetic number, because the mean of its divisors is an integer number (139029696).

Almost surely, 2^919140649 is an apocalyptic number.

It is an amenable number.

919140649 is a deficient number, since it is larger than the sum of its proper divisors (193096919).

919140649 is a wasteful number, since it uses less digits than its factorization.

919140649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7723895.

The product of its (nonzero) digits is 69984, while the sum is 43.

The square root of 919140649 is about 30317.3324849004. The cubic root of 919140649 is about 972.2859075421.

The spelling of 919140649 in words is "nine hundred nineteen million, one hundred forty thousand, six hundred forty-nine".