19701097 has 4 divisors (see below), whose sum is σ = 21216580. Its totient is φ = 18185616.

The previous prime is 19701091. The next prime is 19701127. The reversal of 19701097 is 79010791.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79010791 = 1499 ⋅52709.

It can be written as a sum of positive squares in 2 ways, for example, as 10361961 + 9339136 = 3219^2 + 3056^2 .

It is a cyclic number.

It is not a de Polignac number, because 19701097 - 2⁷ = 19700969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19701091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 757722 + ... + 757747.

It is an arithmetic number, because the mean of its divisors is an integer number (5304145).

Almost surely, 2^19701097 is an apocalyptic number.

It is an amenable number.

19701097 is a deficient number, since it is larger than the sum of its proper divisors (1515483).

19701097 is a wasteful number, since it uses less digits than its factorization.

19701097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515482.

The product of its (nonzero) digits is 3969, while the sum is 34.

The square root of 19701097 is about 4438.5917811847. The cubic root of 19701097 is about 270.0827227095.

The spelling of 19701097 in words is "nineteen million, seven hundred one thousand, ninety-seven".