1046561999 has 4 divisors (see below), whose sum is σ = 1196070864. Its totient is φ = 897053136.

The previous prime is 1046561987. The next prime is 1046562029. The reversal of 1046561999 is 9991656401.

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

It is not a de Polignac number, because 1046561999 - 2¹² = 1046557903 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 (1046561699) 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, 74754422 + ... + 74754435.

It is an arithmetic number, because the mean of its divisors is an integer number (299017716).

Almost surely, 2^1046561999 is an apocalyptic number.

1046561999 is a deficient number, since it is larger than the sum of its proper divisors (149508865).

1046561999 is an equidigital number, since it uses as much as digits as its factorization.

1046561999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149508864.

The product of its (nonzero) digits is 524880, while the sum is 50.

The square root of 1046561999 is about 32350.6104888300. The cubic root of 1046561999 is about 1015.2858195126.

The spelling of 1046561999 in words is "one billion, forty-six million, five hundred sixty-one thousand, nine hundred ninety-nine".