1164547985 has 4 divisors (see below), whose sum is σ = 1397457588. Its totient is φ = 931638384.

The previous prime is 1164547961. The next prime is 1164547997. The reversal of 1164547985 is 5897454611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5897454611 = 71 ⋅83062741.

It can be written as a sum of positive squares in 2 ways, for example, as 607918336 + 556629649 = 24656^2 + 23593^2 .

It is a cyclic number.

It is not a de Polignac number, because 1164547985 - 2⁶ = 1164547921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116454794 + ... + 116454803.

It is an arithmetic number, because the mean of its divisors is an integer number (349364397).

Almost surely, 2^1164547985 is an apocalyptic number.

It is an amenable number.

1164547985 is a deficient number, since it is larger than the sum of its proper divisors (232909603).

1164547985 is an equidigital number, since it uses as much as digits as its factorization.

1164547985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232909602.

The product of its digits is 1209600, while the sum is 50.

The square root of 1164547985 is about 34125.4741359003. The cubic root of 1164547985 is about 1052.0889584520.

The spelling of 1164547985 in words is "one billion, one hundred sixty-four million, five hundred forty-seven thousand, nine hundred eighty-five".