7399039891 has 2 divisors, whose sum is σ = 7399039892. Its totient is φ = 7399039890.

The previous prime is 7399039889. The next prime is 7399039919. The reversal of 7399039891 is 1989309937.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7399039891 - 2¹ = 7399039889 is a prime.

Together with 7399039889, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7399039841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3699519945 + 3699519946.

It is an arithmetic number, because the mean of its divisors is an integer number (3699519946).

Almost surely, 2^7399039891 is an apocalyptic number.

7399039891 is a deficient number, since it is larger than the sum of its proper divisors (1).

7399039891 is an equidigital number, since it uses as much as digits as its factorization.

7399039891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3306744, while the sum is 58.

The square root of 7399039891 is about 86017.6719691948. The cubic root of 7399039891 is about 1948.6108792628.

The spelling of 7399039891 in words is "seven billion, three hundred ninety-nine million, thirty-nine thousand, eight hundred ninety-one".