19770874597 has 2 divisors, whose sum is σ = 19770874598. Its totient is φ = 19770874596.

The previous prime is 19770874549. The next prime is 19770874649. The reversal of 19770874597 is 79547807791.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17670119041 + 2100755556 = 132929^2 + 45834^2 .

It is an emirp because it is prime and its reverse (79547807791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19770874597 - 2⁷ = 19770874469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19770874537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9885437298 + 9885437299.

It is an arithmetic number, because the mean of its divisors is an integer number (9885437299).

Almost surely, 2^19770874597 is an apocalyptic number.

It is an amenable number.

19770874597 is a deficient number, since it is larger than the sum of its proper divisors (1).

19770874597 is an equidigital number, since it uses as much as digits as its factorization.

19770874597 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31116960, while the sum is 64.

The spelling of 19770874597 in words is "nineteen billion, seven hundred seventy million, eight hundred seventy-four thousand, five hundred ninety-seven".