1914207643 has 4 divisors (see below), whose sum is σ = 1922217120. Its totient is φ = 1906198168.

The previous prime is 1914207601. The next prime is 1914207671. The reversal of 1914207643 is 3467024191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3467024191 = 359 ⋅9657449.

It is a cyclic number.

It is not a de Polignac number, because 1914207643 - 2²⁹ = 1377336731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1914307643) 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 3 ways as a sum of consecutive naturals, for example, 4004380 + ... + 4004857.

It is an arithmetic number, because the mean of its divisors is an integer number (480554280).

Almost surely, 2^1914207643 is an apocalyptic number.

1914207643 is a deficient number, since it is larger than the sum of its proper divisors (8009477).

1914207643 is an equidigital number, since it uses as much as digits as its factorization.

1914207643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8009476.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 1914207643 is about 43751.6587456979. The cubic root of 1914207643 is about 1241.6418683775.

The spelling of 1914207643 in words is "one billion, nine hundred fourteen million, two hundred seven thousand, six hundred forty-three".