2729991 has 8 divisors (see below), whose sum is σ = 3970944. Its totient is φ = 1654520.

The previous prime is 2729983. The next prime is 2730001. The reversal of 2729991 is 1999272.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2729991 - 2³ = 2729983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2729921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41331 + ... + 41396.

It is an arithmetic number, because the mean of its divisors is an integer number (496368).

2^2729991 is an apocalyptic number.

2729991 is a deficient number, since it is larger than the sum of its proper divisors (1240953).

2729991 is a wasteful number, since it uses less digits than its factorization.

2729991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82741.

The product of its digits is 20412, while the sum is 39.

The square root of 2729991 is about 1652.2684406597. The cubic root of 2729991 is about 139.7613451021.

The spelling of 2729991 in words is "two million, seven hundred twenty-nine thousand, nine hundred ninety-one".