1353452981 has 4 divisors (see below), whose sum is σ = 1355300172. Its totient is φ = 1351605792.

The previous prime is 1353452953. The next prime is 1353452999. The reversal of 1353452981 is 1892543531.

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 1156612081 + 196840900 = 34009^2 + 14030^2 .

It is a cyclic number.

It is not a de Polignac number, because 1353452981 - 2¹⁴ = 1353436597 is a prime.

It is a super-2 number, since 2×1353452981² = 3663669943555572722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1353452921) 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, 922496 + ... + 923961.

It is an arithmetic number, because the mean of its divisors is an integer number (338825043).

Almost surely, 2^1353452981 is an apocalyptic number.

It is an amenable number.

1353452981 is a deficient number, since it is larger than the sum of its proper divisors (1847191).

1353452981 is an equidigital number, since it uses as much as digits as its factorization.

1353452981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1847190.

The product of its digits is 129600, while the sum is 41.

The square root of 1353452981 is about 36789.3052530216. The cubic root of 1353452981 is about 1106.1509355533.

The spelling of 1353452981 in words is "one billion, three hundred fifty-three million, four hundred fifty-two thousand, nine hundred eighty-one".