1945339247 has 2 divisors, whose sum is σ = 1945339248. Its totient is φ = 1945339246.

The previous prime is 1945339181. The next prime is 1945339271. The reversal of 1945339247 is 7429335491.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (7429335491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1945339247 - 2¹⁰ = 1945338223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1945339147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 972669623 + 972669624.

It is an arithmetic number, because the mean of its divisors is an integer number (972669624).

Almost surely, 2^1945339247 is an apocalyptic number.

1945339247 is a deficient number, since it is larger than the sum of its proper divisors (1).

1945339247 is an equidigital number, since it uses as much as digits as its factorization.

1945339247 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 47.

The square root of 1945339247 is about 44106.0001246996. Note that the first 3 decimals coincide. The cubic root of 1945339247 is about 1248.3368274270.

The spelling of 1945339247 in words is "one billion, nine hundred forty-five million, three hundred thirty-nine thousand, two hundred forty-seven".