1914975691 has 4 divisors (see below), whose sum is σ = 1933567792. Its totient is φ = 1896383592.

The previous prime is 1914975613. The next prime is 1914975767. The reversal of 1914975691 is 1965794191.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1914975691 - 2¹⁵ = 1914942923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1914975091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9295896 + ... + 9296101.

It is an arithmetic number, because the mean of its divisors is an integer number (483391948).

Almost surely, 2^1914975691 is an apocalyptic number.

1914975691 is a deficient number, since it is larger than the sum of its proper divisors (18592101).

1914975691 is a wasteful number, since it uses less digits than its factorization.

1914975691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18592100.

The product of its digits is 612360, while the sum is 52.

The square root of 1914975691 is about 43760.4352240697. The cubic root of 1914975691 is about 1241.8079097578.

The spelling of 1914975691 in words is "one billion, nine hundred fourteen million, nine hundred seventy-five thousand, six hundred ninety-one".