1445909489 has 2 divisors, whose sum is σ = 1445909490. Its totient is φ = 1445909488.

The previous prime is 1445909461. The next prime is 1445909501. The reversal of 1445909489 is 9849095441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1254363889 + 191545600 = 35417^2 + 13840^2 .

It is a cyclic number.

It is not a de Polignac number, because 1445909489 - 2¹² = 1445905393 is a prime.

It is a super-2 number, since 2×1445909489² = 4181308500760482242, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1445909489.

It is not a weakly prime, because it can be changed into another prime (1445909189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 722954744 + 722954745.

It is an arithmetic number, because the mean of its divisors is an integer number (722954745).

Almost surely, 2^1445909489 is an apocalyptic number.

It is an amenable number.

1445909489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1445909489 is an equidigital number, since it uses as much as digits as its factorization.

1445909489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1866240, while the sum is 53.

The square root of 1445909489 is about 38025.1165547195. The cubic root of 1445909489 is about 1130.7858602686.

The spelling of 1445909489 in words is "one billion, four hundred forty-five million, nine hundred nine thousand, four hundred eighty-nine".