1146398509 has 4 divisors (see below), whose sum is σ = 1146501216. Its totient is φ = 1146295804.

The previous prime is 1146398489. The next prime is 1146398521. The reversal of 1146398509 is 9058936411.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1146398509 - 2⁷ = 1146398381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1146398579) 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, 32239 + ... + 57724.

It is an arithmetic number, because the mean of its divisors is an integer number (286625304).

Almost surely, 2^1146398509 is an apocalyptic number.

It is an amenable number.

1146398509 is a deficient number, since it is larger than the sum of its proper divisors (102707).

1146398509 is an equidigital number, since it uses as much as digits as its factorization.

1146398509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102706.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 1146398509 is about 33858.5071880022. The cubic root of 1146398509 is about 1046.5947154055.

The spelling of 1146398509 in words is "one billion, one hundred forty-six million, three hundred ninety-eight thousand, five hundred nine".