7442400389 has 2 divisors, whose sum is σ = 7442400390. Its totient is φ = 7442400388.

The previous prime is 7442400379. The next prime is 7442400391. The reversal of 7442400389 is 9830042447.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7334552164 + 107848225 = 85642^2 + 10385^2 .

It is a cyclic number.

It is not a de Polignac number, because 7442400389 - 2⁴ = 7442400373 is a prime.

It is a Sophie Germain prime.

Together with 7442400391, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7442400349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3721200194 + 3721200195.

It is an arithmetic number, because the mean of its divisors is an integer number (3721200195).

Almost surely, 2^7442400389 is an apocalyptic number.

It is an amenable number.

7442400389 is a deficient number, since it is larger than the sum of its proper divisors (1).

7442400389 is an equidigital number, since it uses as much as digits as its factorization.

7442400389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 193536, while the sum is 41.

The square root of 7442400389 is about 86269.3479110628. The cubic root of 7442400389 is about 1952.4099407660.

The spelling of 7442400389 in words is "seven billion, four hundred forty-two million, four hundred thousand, three hundred eighty-nine".