1444390061 has 2 divisors, whose sum is σ = 1444390062. Its totient is φ = 1444390060.

The previous prime is 1444390049. The next prime is 1444390093. The reversal of 1444390061 is 1600934441.

It is a happy number.

It is an a-pointer prime, because the next prime (1444390093) can be obtained adding 1444390061 to its sum of digits (32).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1385253961 + 59136100 = 37219^2 + 7690^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444390061 - 2⁶ = 1444389997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1444390001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722195030 + 722195031.

It is an arithmetic number, because the mean of its divisors is an integer number (722195031).

Almost surely, 2^1444390061 is an apocalyptic number.

It is an amenable number.

1444390061 is a deficient number, since it is larger than the sum of its proper divisors (1).

1444390061 is an equidigital number, since it uses as much as digits as its factorization.

1444390061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 1444390061 is about 38005.1320350292. The cubic root of 1444390061 is about 1130.3896275632.

The spelling of 1444390061 in words is "one billion, four hundred forty-four million, three hundred ninety thousand, sixty-one".