1161764427 has 4 divisors (see below), whose sum is σ = 1549019240. Its totient is φ = 774509616.

The previous prime is 1161764419. The next prime is 1161764453. The reversal of 1161764427 is 7244671611.

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

It is not a de Polignac number, because 1161764427 - 2³ = 1161764419 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1161764327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193627402 + ... + 193627407.

It is an arithmetic number, because the mean of its divisors is an integer number (387254810).

Almost surely, 2^1161764427 is an apocalyptic number.

1161764427 is a deficient number, since it is larger than the sum of its proper divisors (387254813).

1161764427 is an equidigital number, since it uses as much as digits as its factorization.

1161764427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387254812.

The product of its digits is 56448, while the sum is 39.

The square root of 1161764427 is about 34084.6655697250. The cubic root of 1161764427 is about 1051.2500386598.

The spelling of 1161764427 in words is "one billion, one hundred sixty-one million, seven hundred sixty-four thousand, four hundred twenty-seven".