1161980459 has 4 divisors (see below), whose sum is σ = 1163697504. Its totient is φ = 1160263416.

The previous prime is 1161980431. The next prime is 1161980461. The reversal of 1161980459 is 9540891611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9540891611 = 971 ⋅9825841.

It is a cyclic number.

It is not a de Polignac number, because 1161980459 - 2¹² = 1161976363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161980419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 857507 + ... + 858860.

It is an arithmetic number, because the mean of its divisors is an integer number (290924376).

Almost surely, 2^1161980459 is an apocalyptic number.

1161980459 is a deficient number, since it is larger than the sum of its proper divisors (1717045).

1161980459 is an equidigital number, since it uses as much as digits as its factorization.

1161980459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717044.

The product of its (nonzero) digits is 77760, while the sum is 44.

The square root of 1161980459 is about 34087.8344721398. The cubic root of 1161980459 is about 1051.3151951774.

The spelling of 1161980459 in words is "one billion, one hundred sixty-one million, nine hundred eighty thousand, four hundred fifty-nine".