1442861869 has 2 divisors, whose sum is σ = 1442861870. Its totient is φ = 1442861868.

The previous prime is 1442861803. The next prime is 1442861897. The reversal of 1442861869 is 9681682441.

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., 1152602500 + 290259369 = 33950^2 + 17037^2 .

It is a cyclic number.

It is not a de Polignac number, because 1442861869 - 2²⁵ = 1409307437 is a prime.

It is a super-2 number, since 2×1442861869² = 4163700746028346322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1442861569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 721430934 + 721430935.

It is an arithmetic number, because the mean of its divisors is an integer number (721430935).

Almost surely, 2^1442861869 is an apocalyptic number.

It is an amenable number.

1442861869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1442861869 is an equidigital number, since it uses as much as digits as its factorization.

1442861869 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 49.

The square root of 1442861869 is about 37985.0216401149. The cubic root of 1442861869 is about 1129.9908290169.

The spelling of 1442861869 in words is "one billion, four hundred forty-two million, eight hundred sixty-one thousand, eight hundred sixty-nine".