19740697 has 2 divisors, whose sum is σ = 19740698. Its totient is φ = 19740696.

The previous prime is 19740691. The next prime is 19740703. The reversal of 19740697 is 79604791.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (19740691) and next prime (19740703).

It can be written as a sum of positive squares in only one way, i.e., 19571776 + 168921 = 4424^2 + 411^2 .

It is a cyclic number.

It is not a de Polignac number, because 19740697 - 2¹⁵ = 19707929 is a prime.

It is not a weakly prime, because it can be changed into another prime (19740691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9870348 + 9870349.

It is an arithmetic number, because the mean of its divisors is an integer number (9870349).

Almost surely, 2^19740697 is an apocalyptic number.

It is an amenable number.

19740697 is a deficient number, since it is larger than the sum of its proper divisors (1).

19740697 is an equidigital number, since it uses as much as digits as its factorization.

19740697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 43.

The square root of 19740697 is about 4443.0504160993. The cubic root of 19740697 is about 270.2635606569.

The spelling of 19740697 in words is "nineteen million, seven hundred forty thousand, six hundred ninety-seven".