1453989909 has 4 divisors (see below), whose sum is σ = 1938653216. Its totient is φ = 969326604.

The previous prime is 1453989899. The next prime is 1453989941. The reversal of 1453989909 is 9099893541.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1453989909 - 2⁴ = 1453989893 is a prime.

It is a super-2 number, since 2×1453989909² = 4228173310947656562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1453989959) 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, 242331649 + ... + 242331654.

It is an arithmetic number, because the mean of its divisors is an integer number (484663304).

Almost surely, 2^1453989909 is an apocalyptic number.

It is an amenable number.

1453989909 is a deficient number, since it is larger than the sum of its proper divisors (484663307).

1453989909 is an equidigital number, since it uses as much as digits as its factorization.

1453989909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484663306.

The product of its (nonzero) digits is 3149280, while the sum is 57.

The square root of 1453989909 is about 38131.2196107074. The cubic root of 1453989909 is about 1132.8884022714. Note that the first 3 decimals are identical.

The spelling of 1453989909 in words is "one billion, four hundred fifty-three million, nine hundred eighty-nine thousand, nine hundred nine".