1900047 has 8 divisors (see below), whose sum is σ = 2553856. Its totient is φ = 1256472.

The previous prime is 1900043. The next prime is 1900049. The reversal of 1900047 is 7400091.

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

It is not a de Polignac number, because 1900047 - 2² = 1900043 is a prime.

It is a super-2 number, since 2×1900047² = 7220357204418, which contains 22 as substring.

It is a Duffinian number.

1900047 is a lucky number.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 1899996 and 1900032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900043) 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, 2113 + ... + 2874.

It is an arithmetic number, because the mean of its divisors is an integer number (319232).

2^1900047 is an apocalyptic number.

1900047 is a deficient number, since it is larger than the sum of its proper divisors (653809).

1900047 is a wasteful number, since it uses less digits than its factorization.

1900047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5117.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 1900047 is about 1378.4219237955. The cubic root of 1900047 is about 123.8572542253.

The spelling of 1900047 in words is "one million, nine hundred thousand, forty-seven".