1051999659 has 6 divisors (see below), whose sum is σ = 1519555076. Its totient is φ = 701333100.

The previous prime is 1051999649. The next prime is 1051999747. The reversal of 1051999659 is 9569991501.

It is not a de Polignac number, because 1051999659 - 2⁴ = 1051999643 is a prime.

It is a super-2 number, since 2×1051999659² = 2213406565072232562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1051999609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 58444417 + ... + 58444434.

Almost surely, 2^1051999659 is an apocalyptic number.

1051999659 is a deficient number, since it is larger than the sum of its proper divisors (467555417).

1051999659 is a wasteful number, since it uses less digits than its factorization.

1051999659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116888857 (or 116888854 counting only the distinct ones).

The product of its (nonzero) digits is 984150, while the sum is 54.

The square root of 1051999659 is about 32434.5442237131. The cubic root of 1051999659 is about 1017.0411686447.

The spelling of 1051999659 in words is "one billion, fifty-one million, nine hundred ninety-nine thousand, six hundred fifty-nine".