1936991 has 16 divisors (see below), whose sum is σ = 2363904. Its totient is φ = 1551264.

The previous prime is 1936981. The next prime is 1936999. The reversal of 1936991 is 1996391.

It is a cyclic number.

It is not a de Polignac number, because 1936991 - 2¹⁸ = 1674847 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 (1936999) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8420 + ... + 8646.

It is an arithmetic number, because the mean of its divisors is an integer number (147744).

2^1936991 is an apocalyptic number.

1936991 is a deficient number, since it is larger than the sum of its proper divisors (426913).

1936991 is a wasteful number, since it uses less digits than its factorization.

1936991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310.

The product of its digits is 13122, while the sum is 38.

The square root of 1936991 is about 1391.7582405001. The cubic root of 1936991 is about 124.6548558814.

The spelling of 1936991 in words is "one million, nine hundred thirty-six thousand, nine hundred ninety-one".