7439449397 has 2 divisors, whose sum is σ = 7439449398. Its totient is φ = 7439449396.

The previous prime is 7439449343. The next prime is 7439449399. The reversal of 7439449397 is 7939449347.

7439449397 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5347850641 + 2091598756 = 73129^2 + 45734^2 .

It is an emirp because it is prime and its reverse (7939449347) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7439449397 - 2⁶ = 7439449333 is a prime.

Together with 7439449399, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7439449399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3719724698 + 3719724699.

It is an arithmetic number, because the mean of its divisors is an integer number (3719724699).

Almost surely, 2^7439449397 is an apocalyptic number.

It is an amenable number.

7439449397 is a deficient number, since it is larger than the sum of its proper divisors (1).

7439449397 is an equidigital number, since it uses as much as digits as its factorization.

7439449397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20575296, while the sum is 59.

The square root of 7439449397 is about 86252.2428519978. The cubic root of 7439449397 is about 1952.1518561210.

The spelling of 7439449397 in words is "seven billion, four hundred thirty-nine million, four hundred forty-nine thousand, three hundred ninety-seven".