919424645 has 8 divisors (see below), whose sum is σ = 1103748120. Its totient is φ = 735247360.

The previous prime is 919424621. The next prime is 919424647. The reversal of 919424645 is 546424919.

It can be written as a sum of positive squares in 4 ways, for example, as 331895524 + 587529121 = 18218^2 + 24239^2 .

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

It is not a de Polignac number, because 919424645 - 2¹² = 919420549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 919424596 and 919424605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (919424647) 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, 22196 + ... + 48285.

It is an arithmetic number, because the mean of its divisors is an integer number (137968515).

Almost surely, 2^919424645 is an apocalyptic number.

It is an amenable number.

919424645 is a deficient number, since it is larger than the sum of its proper divisors (184323475).

919424645 is a wasteful number, since it uses less digits than its factorization.

919424645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73095.

The product of its digits is 311040, while the sum is 44.

The square root of 919424645 is about 30322.0158465759. The cubic root of 919424645 is about 972.3860361694.

The spelling of 919424645 in words is "nine hundred nineteen million, four hundred twenty-four thousand, six hundred forty-five".