19770229 has 2 divisors, whose sum is σ = 19770230. Its totient is φ = 19770228.

The previous prime is 19770209. The next prime is 19770253. The reversal of 19770229 is 92207791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17514225 + 2256004 = 4185^2 + 1502^2 .

It is a cyclic number.

It is not a de Polignac number, because 19770229 - 2⁵ = 19770197 is a prime.

It is equal to p_1256896 and since 19770229 and 1256896 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19770209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9885114 + 9885115.

It is an arithmetic number, because the mean of its divisors is an integer number (9885115).

Almost surely, 2^19770229 is an apocalyptic number.

It is an amenable number.

19770229 is a deficient number, since it is larger than the sum of its proper divisors (1).

19770229 is an equidigital number, since it uses as much as digits as its factorization.

19770229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 19770229 is about 4446.3725664861. The cubic root of 19770229 is about 270.3982645586.

The spelling of 19770229 in words is "nineteen million, seven hundred seventy thousand, two hundred twenty-nine".