1931949 has 12 divisors (see below), whose sum is σ = 2820636. Its totient is φ = 1274112.

The previous prime is 1931933. The next prime is 1931957. The reversal of 1931949 is 9491391.

It can be written as a sum of positive squares in 2 ways, for example, as 1550025 + 381924 = 1245^2 + 618^2 .

It is not a de Polignac number, because 1931949 - 2⁴ = 1931933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1931989) 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, 234 + ... + 1979.

It is an arithmetic number, because the mean of its divisors is an integer number (235053).

2^1931949 is an apocalyptic number.

It is an amenable number.

1931949 is a deficient number, since it is larger than the sum of its proper divisors (888687).

1931949 is a wasteful number, since it uses less digits than its factorization.

1931949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316 (or 2313 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 1931949 is about 1389.9456823919. The cubic root of 1931949 is about 124.5466027693.

The spelling of 1931949 in words is "one million, nine hundred thirty-one thousand, nine hundred forty-nine".