1489740997 has 2 divisors, whose sum is σ = 1489740998. Its totient is φ = 1489740996.

The previous prime is 1489740971. The next prime is 1489741009. The reversal of 1489740997 is 7990479841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1277776516 + 211964481 = 35746^2 + 14559^2 .

It is a cyclic number.

It is not a de Polignac number, because 1489740997 - 2⁷ = 1489740869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1489740097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 744870498 + 744870499.

It is an arithmetic number, because the mean of its divisors is an integer number (744870499).

Almost surely, 2^1489740997 is an apocalyptic number.

It is an amenable number.

1489740997 is a deficient number, since it is larger than the sum of its proper divisors (1).

1489740997 is an equidigital number, since it uses as much as digits as its factorization.

1489740997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 58.

The square root of 1489740997 is about 38597.1630693241. The cubic root of 1489740997 is about 1142.0985754624.

The spelling of 1489740997 in words is "one billion, four hundred eighty-nine million, seven hundred forty thousand, nine hundred ninety-seven".