1900947 has 4 divisors (see below), whose sum is σ = 2534600. Its totient is φ = 1267296.

The previous prime is 1900937. The next prime is 1900981. The reversal of 1900947 is 7490091.

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

It is not a de Polignac number, because 1900947 - 2¹⁰ = 1899923 is a prime.

It is a super-2 number, since 2×1900947² = 7227198993618, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

1900947 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1900907) 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, 316822 + ... + 316827.

It is an arithmetic number, because the mean of its divisors is an integer number (633650).

2^1900947 is an apocalyptic number.

1900947 is a deficient number, since it is larger than the sum of its proper divisors (633653).

1900947 is an equidigital number, since it uses as much as digits as its factorization.

1900947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633652.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 1900947 is about 1378.7483454206. The cubic root of 1900947 is about 123.8768070632.

The spelling of 1900947 in words is "one million, nine hundred thousand, nine hundred forty-seven".