1900797 has 4 divisors (see below), whose sum is σ = 2534400. Its totient is φ = 1267196.

The previous prime is 1900777. The next prime is 1900813. The reversal of 1900797 is 7970091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1900797 - 2⁶ = 1900733 is a prime.

It is a super-2 number, since 2×1900797² = 7226058470418, which contains 22 as substring.

It is a D-number.

1900797 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1900757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316797 + ... + 316802.

It is an arithmetic number, because the mean of its divisors is an integer number (633600).

2^1900797 is an apocalyptic number.

It is an amenable number.

1900797 is a deficient number, since it is larger than the sum of its proper divisors (633603).

1900797 is an equidigital number, since it uses as much as digits as its factorization.

1900797 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 633602.

The product of its (nonzero) digits is 3969, while the sum is 33.

The square root of 1900797 is about 1378.6939471833. The cubic root of 1900797 is about 123.8735486855.

The spelling of 1900797 in words is "one million, nine hundred thousand, seven hundred ninety-seven".