1523969 has 2 divisors, whose sum is σ = 1523970. Its totient is φ = 1523968.

The previous prime is 1523953. The next prime is 1523981. The reversal of 1523969 is 9693251.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1050625 + 473344 = 1025^2 + 688^2 .

It is an emirp because it is prime and its reverse (9693251) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1523969 - 2⁴ = 1523953 is a prime.

It is a super-2 number, since 2×1523969² = 4644963025922, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1523939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 761984 + 761985.

It is an arithmetic number, because the mean of its divisors is an integer number (761985).

2^1523969 is an apocalyptic number.

It is an amenable number.

1523969 is a deficient number, since it is larger than the sum of its proper divisors (1).

1523969 is an equidigital number, since it uses as much as digits as its factorization.

1523969 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14580, while the sum is 35.

The square root of 1523969 is about 1234.4913932466. The cubic root of 1523969 is about 115.0779307944.

The spelling of 1523969 in words is "one million, five hundred twenty-three thousand, nine hundred sixty-nine".