1439731849 has 2 divisors, whose sum is σ = 1439731850. Its totient is φ = 1439731848.

The previous prime is 1439731781. The next prime is 1439731879. The reversal of 1439731849 is 9481379341.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 946669824 + 493062025 = 30768^2 + 22205^2 .

It is a cyclic number.

It is not a de Polignac number, because 1439731849 - 2¹³ = 1439723657 is a prime.

It is not a weakly prime, because it can be changed into another prime (1439731879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 719865924 + 719865925.

It is an arithmetic number, because the mean of its divisors is an integer number (719865925).

Almost surely, 2^1439731849 is an apocalyptic number.

It is an amenable number.

1439731849 is a deficient number, since it is larger than the sum of its proper divisors (1).

1439731849 is an equidigital number, since it uses as much as digits as its factorization.

1439731849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 49.

The square root of 1439731849 is about 37943.7985578671. The cubic root of 1439731849 is about 1129.1731359303.

The spelling of 1439731849 in words is "one billion, four hundred thirty-nine million, seven hundred thirty-one thousand, eight hundred forty-nine".