2920831 has 2 divisors, whose sum is σ = 2920832. Its totient is φ = 2920830.

The previous prime is 2920829. The next prime is 2920837. The reversal of 2920831 is 1380292.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2920831 - 2¹ = 2920829 is a prime.

It is a super-2 number, since 2×2920831² = 17062507461122, which contains 22 as substring.

Together with 2920829, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2920796 and 2920805.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2920837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1460415 + 1460416.

It is an arithmetic number, because the mean of its divisors is an integer number (1460416).

2^2920831 is an apocalyptic number.

2920831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2920831 is an equidigital number, since it uses as much as digits as its factorization.

2920831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 2920831 is about 1709.0438847496. The cubic root of 2920831 is about 142.9449475927.

The spelling of 2920831 in words is "two million, nine hundred twenty thousand, eight hundred thirty-one".