2291929 has 2 divisors, whose sum is σ = 2291930. Its totient is φ = 2291928.

The previous prime is 2291921. The next prime is 2291959. The reversal of 2291929 is 9291922.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1440000 + 851929 = 1200^2 + 923^2 .

It is a cyclic number.

It is not a de Polignac number, because 2291929 - 2³ = 2291921 is a prime.

It is an Ulam number.

2291929 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2291894 and 2291903.

It is not a weakly prime, because it can be changed into another prime (2291921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1145964 + 1145965.

It is an arithmetic number, because the mean of its divisors is an integer number (1145965).

2^2291929 is an apocalyptic number.

It is an amenable number.

2291929 is a deficient number, since it is larger than the sum of its proper divisors (1).

2291929 is an equidigital number, since it uses as much as digits as its factorization.

2291929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 34.

The square root of 2291929 is about 1513.9118204176. The cubic root of 2291929 is about 131.8460287653.

The spelling of 2291929 in words is "two million, two hundred ninety-one thousand, nine hundred twenty-nine".