1439491049 has 2 divisors, whose sum is σ = 1439491050. Its totient is φ = 1439491048.

The previous prime is 1439491037. The next prime is 1439491051. The reversal of 1439491049 is 9401949341.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1432092649 + 7398400 = 37843^2 + 2720^2 .

It is a cyclic number.

It is not a de Polignac number, because 1439491049 - 2⁴ = 1439491033 is a prime.

It is a super-2 number, since 2×1439491049² = 4144268960302240802, which contains 22 as substring.

Together with 1439491051, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1439491019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719745524 + 719745525.

It is an arithmetic number, because the mean of its divisors is an integer number (719745525).

Almost surely, 2^1439491049 is an apocalyptic number.

It is an amenable number.

1439491049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1439491049 is an equidigital number, since it uses as much as digits as its factorization.

1439491049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 139968, while the sum is 44.

The square root of 1439491049 is about 37940.6253111358. The cubic root of 1439491049 is about 1129.1101797505.

The spelling of 1439491049 in words is "one billion, four hundred thirty-nine million, four hundred ninety-one thousand, forty-nine".