1969173097 has 4 divisors (see below), whose sum is σ = 1969700436. Its totient is φ = 1968645760.

The previous prime is 1969173067. The next prime is 1969173113. The reversal of 1969173097 is 7903719691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 284563161 + 1684609936 = 16869^2 + 41044^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1969173097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1969173007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258028 + ... + 265549.

It is an arithmetic number, because the mean of its divisors is an integer number (492425109).

Almost surely, 2^1969173097 is an apocalyptic number.

It is an amenable number.

1969173097 is a deficient number, since it is larger than the sum of its proper divisors (527339).

1969173097 is an equidigital number, since it uses as much as digits as its factorization.

1969173097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527338.

The product of its (nonzero) digits is 642978, while the sum is 52.

The square root of 1969173097 is about 44375.3658801818. The cubic root of 1969173097 is about 1253.4142597999.

The spelling of 1969173097 in words is "one billion, nine hundred sixty-nine million, one hundred seventy-three thousand, ninety-seven".