19770073 has 2 divisors, whose sum is σ = 19770074. Its totient is φ = 19770072.

The previous prime is 19770071. The next prime is 19770103. The reversal of 19770073 is 37007791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19642624 + 127449 = 4432^2 + 357^2 .

It is a cyclic number.

It is not a de Polignac number, because 19770073 - 2¹ = 19770071 is a prime.

Together with 19770071, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (19770071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9885036 + 9885037.

It is an arithmetic number, because the mean of its divisors is an integer number (9885037).

Almost surely, 2^19770073 is an apocalyptic number.

It is an amenable number.

19770073 is a deficient number, since it is larger than the sum of its proper divisors (1).

19770073 is an equidigital number, since it uses as much as digits as its factorization.

19770073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9261, while the sum is 34.

The square root of 19770073 is about 4446.3550240618. The cubic root of 19770073 is about 270.3975533505.

The spelling of 19770073 in words is "nineteen million, seven hundred seventy thousand, seventy-three".