19734997 has 2 divisors, whose sum is σ = 19734998. Its totient is φ = 19734996.

The previous prime is 19734983. The next prime is 19735007. The reversal of 19734997 is 79943791.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19704721 + 30276 = 4439^2 + 174^2 .

It is a cyclic number.

It is not a de Polignac number, because 19734997 - 2¹¹ = 19732949 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 19734997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19734907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9867498 + 9867499.

It is an arithmetic number, because the mean of its divisors is an integer number (9867499).

Almost surely, 2^19734997 is an apocalyptic number.

It is an amenable number.

19734997 is a deficient number, since it is larger than the sum of its proper divisors (1).

19734997 is an equidigital number, since it uses as much as digits as its factorization.

19734997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 49.

The square root of 19734997 is about 4442.4089185936. The cubic root of 19734997 is about 270.2375458614.

The spelling of 19734997 in words is "nineteen million, seven hundred thirty-four thousand, nine hundred ninety-seven".