1631943 has 12 divisors (see below), whose sum is σ = 2372760. Its totient is φ = 1080816.

The previous prime is 1631939. The next prime is 1631951. The reversal of 1631943 is 3491361.

It is not a de Polignac number, because 1631943 - 2² = 1631939 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631143) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1105 + ... + 2117.

It is an arithmetic number, because the mean of its divisors is an integer number (197730).

2^1631943 is an apocalyptic number.

1631943 is a deficient number, since it is larger than the sum of its proper divisors (740817).

1631943 is a wasteful number, since it uses less digits than its factorization.

1631943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198 (or 1195 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 1631943 is about 1277.4752443785. The cubic root of 1631943 is about 117.7339356288.

The spelling of 1631943 in words is "one million, six hundred thirty-one thousand, nine hundred forty-three".