2197961407 has 2 divisors, whose sum is σ = 2197961408. Its totient is φ = 2197961406.

The previous prime is 2197961387. The next prime is 2197961419. The reversal of 2197961407 is 7041697912.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2197961407 is a prime.

It is a super-2 number, since 2×2197961407² = 9662068693322839298, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2197961107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098980703 + 1098980704.

It is an arithmetic number, because the mean of its divisors is an integer number (1098980704).

Almost surely, 2^2197961407 is an apocalyptic number.

2197961407 is a deficient number, since it is larger than the sum of its proper divisors (1).

2197961407 is an equidigital number, since it uses as much as digits as its factorization.

2197961407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 2197961407 is about 46882.4210872263. The cubic root of 2197961407 is about 1300.1895989737.

The spelling of 2197961407 in words is "two billion, one hundred ninety-seven million, nine hundred sixty-one thousand, four hundred seven".