1983157 has 4 divisors (see below), whose sum is σ = 2163456. Its totient is φ = 1802860.

The previous prime is 1983143. The next prime is 1983197. The reversal of 1983157 is 7513891.

It is a happy number.

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 a de Polignac number, because none of the positive numbers 2^k-1983157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1983197) 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, 90133 + ... + 90154.

It is an arithmetic number, because the mean of its divisors is an integer number (540864).

2^1983157 is an apocalyptic number.

It is an amenable number.

1983157 is a deficient number, since it is larger than the sum of its proper divisors (180299).

1983157 is a wasteful number, since it uses less digits than its factorization.

1983157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180298.

The product of its digits is 7560, while the sum is 34.

The square root of 1983157 is about 1408.2460722473. The cubic root of 1983157 is about 125.6374266397.

The spelling of 1983157 in words is "one million, nine hundred eighty-three thousand, one hundred fifty-seven".