2119947397 has 2 divisors, whose sum is σ = 2119947398. Its totient is φ = 2119947396.

The previous prime is 2119947367. The next prime is 2119947419. The reversal of 2119947397 is 7937499112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1971448801 + 148498596 = 44401^2 + 12186^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2119947397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2119947317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1059973698 + 1059973699.

It is an arithmetic number, because the mean of its divisors is an integer number (1059973699).

Almost surely, 2^2119947397 is an apocalyptic number.

It is an amenable number.

2119947397 is a deficient number, since it is larger than the sum of its proper divisors (1).

2119947397 is an equidigital number, since it uses as much as digits as its factorization.

2119947397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 52.

The square root of 2119947397 is about 46042.8864972647. The cubic root of 2119947397 is about 1284.6210325493.

The spelling of 2119947397 in words is "two billion, one hundred nineteen million, nine hundred forty-seven thousand, three hundred ninety-seven".