1253515983 has 4 divisors (see below), whose sum is σ = 1671354648. Its totient is φ = 835677320.

The previous prime is 1253515979. The next prime is 1253516041. The reversal of 1253515983 is 3895153521.

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

It is a cyclic number.

It is not a de Polignac number, because 1253515983 - 2² = 1253515979 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1253515943) 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 3 ways as a sum of consecutive naturals, for example, 208919328 + ... + 208919333.

It is an arithmetic number, because the mean of its divisors is an integer number (417838662).

Almost surely, 2^1253515983 is an apocalyptic number.

1253515983 is a deficient number, since it is larger than the sum of its proper divisors (417838665).

1253515983 is an equidigital number, since it uses as much as digits as its factorization.

1253515983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417838664.

The product of its digits is 162000, while the sum is 42.

The square root of 1253515983 is about 35405.0276514509. The cubic root of 1253515983 is about 1078.2263936264.

The spelling of 1253515983 in words is "one billion, two hundred fifty-three million, five hundred fifteen thousand, nine hundred eighty-three".