1219140697 has 4 divisors (see below), whose sum is σ = 1219217076. Its totient is φ = 1219064320.

The previous prime is 1219140679. The next prime is 1219140721. The reversal of 1219140697 is 7960419121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 709103641 + 510037056 = 26629^2 + 22584^2 .

It is a cyclic number.

It is not a de Polignac number, because 1219140697 - 2⁷ = 1219140569 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1219140647) 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, 4108 + ... + 49549.

It is an arithmetic number, because the mean of its divisors is an integer number (304804269).

Almost surely, 2^1219140697 is an apocalyptic number.

It is an amenable number.

1219140697 is a deficient number, since it is larger than the sum of its proper divisors (76379).

1219140697 is an equidigital number, since it uses as much as digits as its factorization.

1219140697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76378.

The product of its (nonzero) digits is 27216, while the sum is 40.

The square root of 1219140697 is about 34916.1953396987. The cubic root of 1219140697 is about 1068.2787994216.

The spelling of 1219140697 in words is "one billion, two hundred nineteen million, one hundred forty thousand, six hundred ninety-seven".