1045381899 has 4 divisors (see below), whose sum is σ = 1393842536. Its totient is φ = 696921264.

The previous prime is 1045381891. The next prime is 1045381903. The reversal of 1045381899 is 9981835401.

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

It is not a de Polignac number, because 1045381899 - 2³ = 1045381891 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1045381891) 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, 174230314 + ... + 174230319.

It is an arithmetic number, because the mean of its divisors is an integer number (348460634).

Almost surely, 2^1045381899 is an apocalyptic number.

1045381899 is a deficient number, since it is larger than the sum of its proper divisors (348460637).

1045381899 is an equidigital number, since it uses as much as digits as its factorization.

1045381899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348460636.

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 1045381899 is about 32332.3661212723. The cubic root of 1045381899 is about 1014.9040649619.

The spelling of 1045381899 in words is "one billion, forty-five million, three hundred eighty-one thousand, eight hundred ninety-nine".