2902391 has 8 divisors (see below), whose sum is σ = 3046080. Its totient is φ = 2762208.

The previous prime is 2902369. The next prime is 2902397. The reversal of 2902391 is 1932092.

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 2902391 - 2⁶ = 2902327 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2902391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2902397) 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, 905 + ... + 2573.

It is an arithmetic number, because the mean of its divisors is an integer number (380760).

2^2902391 is an apocalyptic number.

2902391 is a deficient number, since it is larger than the sum of its proper divisors (143689).

2902391 is a wasteful number, since it uses less digits than its factorization.

2902391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1753.

The product of its (nonzero) digits is 972, while the sum is 26.

The square root of 2902391 is about 1703.6405137235. The cubic root of 2902391 is about 142.6434955478.

Subtracting from 2902391 its reverse (1932092), we obtain a cube (970299 = 99³).

The spelling of 2902391 in words is "two million, nine hundred two thousand, three hundred ninety-one".