7489939 has 2 divisors, whose sum is σ = 7489940. Its totient is φ = 7489938.

The previous prime is 7489931. The next prime is 7489943. The reversal of 7489939 is 9399847.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 7489939 - 2³ = 7489931 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 7489892 and 7489901.

It is not a weakly prime, because it can be changed into another prime (7489931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3744969 + 3744970.

It is an arithmetic number, because the mean of its divisors is an integer number (3744970).

Almost surely, 2^7489939 is an apocalyptic number.

7489939 is a deficient number, since it is larger than the sum of its proper divisors (1).

7489939 is an equidigital number, since it uses as much as digits as its factorization.

7489939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 49.

The square root of 7489939 is about 2736.7752922007. The cubic root of 7489939 is about 195.6558151500.

The spelling of 7489939 in words is "seven million, four hundred eighty-nine thousand, nine hundred thirty-nine".