4929781 has 2 divisors, whose sum is σ = 4929782. Its totient is φ = 4929780.

The previous prime is 4929773. The next prime is 4929791. The reversal of 4929781 is 1879294.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2588881 + 2340900 = 1609^2 + 1530^2 .

It is a cyclic number.

It is not a de Polignac number, because 4929781 - 2³ = 4929773 is a prime.

It is a super-2 number, since 2×4929781² = 48605481415922, which contains 22 as substring.

4929781 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4929731) 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, 2464890 + 2464891.

It is an arithmetic number, because the mean of its divisors is an integer number (2464891).

Almost surely, 2^4929781 is an apocalyptic number.

It is an amenable number.

4929781 is a deficient number, since it is larger than the sum of its proper divisors (1).

4929781 is an equidigital number, since it uses as much as digits as its factorization.

4929781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 40.

The square root of 4929781 is about 2220.3110142500. The cubic root of 4929781 is about 170.1933325290.

The spelling of 4929781 in words is "four million, nine hundred twenty-nine thousand, seven hundred eighty-one".