1917690045 has 32 divisors (see below), whose sum is σ = 3238963200. Its totient is φ = 966187584.

The previous prime is 1917690041. The next prime is 1917690079. The reversal of 1917690045 is 5400967191.

1917690045 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1917690045 - 2² = 1917690041 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1917689979 and 1917690006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1917690041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 92944 + ... + 111686.

It is an arithmetic number, because the mean of its divisors is an integer number (101217600).

Almost surely, 2^1917690045 is an apocalyptic number.

1917690045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1917690045 is a deficient number, since it is larger than the sum of its proper divisors (1321273155).

1917690045 is a wasteful number, since it uses less digits than its factorization.

1917690045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19129.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 1917690045 is about 43791.4380330219. The cubic root of 1917690045 is about 1242.3943601846.

The spelling of 1917690045 in words is "one billion, nine hundred seventeen million, six hundred ninety thousand, forty-five".