1973865 has 8 divisors (see below), whose sum is σ = 3158208. Its totient is φ = 1052720.

The previous prime is 1973857. The next prime is 1973893. The reversal of 1973865 is 5683791.

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

It is not a de Polignac number, because 1973865 - 2³ = 1973857 is a prime.

It is a super-2 number, since 2×1973865² = 7792286076450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65781 + ... + 65810.

It is an arithmetic number, because the mean of its divisors is an integer number (394776).

2^1973865 is an apocalyptic number.

1973865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1973865 is a deficient number, since it is larger than the sum of its proper divisors (1184343).

1973865 is a wasteful number, since it uses less digits than its factorization.

1973865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131599.

The product of its digits is 45360, while the sum is 39.

The square root of 1973865 is about 1404.9430593444. The cubic root of 1973865 is about 125.4408963879.

The spelling of 1973865 in words is "one million, nine hundred seventy-three thousand, eight hundred sixty-five".