1961897 has 8 divisors (see below), whose sum is σ = 2314752. Its totient is φ = 1627200.

The previous prime is 1961893. The next prime is 1961899. The reversal of 1961897 is 7981691.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1961897 - 2² = 1961893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961893) 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, 4304 + ... + 4737.

It is an arithmetic number, because the mean of its divisors is an integer number (289344).

2^1961897 is an apocalyptic number.

It is an amenable number.

1961897 is a deficient number, since it is larger than the sum of its proper divisors (352855).

1961897 is an equidigital number, since it uses as much as digits as its factorization.

1961897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9079.

The product of its digits is 27216, while the sum is 41.

The square root of 1961897 is about 1400.6773361485. The cubic root of 1961897 is about 125.1868565379.

It can be divided in two parts, 19 and 61897, that added together give a palindrome (61916).

The spelling of 1961897 in words is "one million, nine hundred sixty-one thousand, eight hundred ninety-seven".