1497989 has 4 divisors (see below), whose sum is σ = 1586124. Its totient is φ = 1409856.

The previous prime is 1497983. The next prime is 1497997. The reversal of 1497989 is 9897941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1288225 + 209764 = 1135^2 + 458^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1497989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1497983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44042 + ... + 44075.

It is an arithmetic number, because the mean of its divisors is an integer number (396531).

2^1497989 is an apocalyptic number.

It is an amenable number.

1497989 is a deficient number, since it is larger than the sum of its proper divisors (88135).

1497989 is an equidigital number, since it uses as much as digits as its factorization.

1497989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88134.

The product of its digits is 163296, while the sum is 47.

The square root of 1497989 is about 1223.9236087273. The cubic root of 1497989 is about 114.4202453696.

The spelling of 1497989 in words is "one million, four hundred ninety-seven thousand, nine hundred eighty-nine".