1523009997 has 24 divisors (see below), whose sum is σ = 2242356480. Its totient is φ = 995842080.

The previous prime is 1523009989. The next prime is 1523010001. The reversal of 1523009997 is 7999003251.

It is a happy number.

It is not a de Polignac number, because 1523009997 - 2³ = 1523009989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1523009927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 197704 + ... + 205262.

It is an arithmetic number, because the mean of its divisors is an integer number (93431520).

Almost surely, 2^1523009997 is an apocalyptic number.

It is an amenable number.

1523009997 is a deficient number, since it is larger than the sum of its proper divisors (719346483).

1523009997 is a wasteful number, since it uses less digits than its factorization.

1523009997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7993 (or 7990 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 1523009997 is about 39025.7606844505. The cubic root of 1523009997 is about 1150.5378698792.

The spelling of 1523009997 in words is "one billion, five hundred twenty-three million, nine thousand, nine hundred ninety-seven".