34489781 has 2 divisors, whose sum is σ = 34489782. Its totient is φ = 34489780.

The previous prime is 34489727. The next prime is 34489789. The reversal of 34489781 is 18798443.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23367556 + 11122225 = 4834^2 + 3335^2 .

It is a cyclic number.

It is not a de Polignac number, because 34489781 - 2⁶ = 34489717 is a prime.

It is a super-2 number, since 2×34489781² = 2379089986855922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34489789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17244890 + 17244891.

It is an arithmetic number, because the mean of its divisors is an integer number (17244891).

Almost surely, 2^34489781 is an apocalyptic number.

It is an amenable number.

34489781 is a deficient number, since it is larger than the sum of its proper divisors (1).

34489781 is an equidigital number, since it uses as much as digits as its factorization.

34489781 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 44.

The square root of 34489781 is about 5872.8000987604. The cubic root of 34489781 is about 325.5093582900.

The spelling of 34489781 in words is "thirty-four million, four hundred eighty-nine thousand, seven hundred eighty-one".