1177140091 has 4 divisors (see below), whose sum is σ = 1215112384. Its totient is φ = 1139167800.

The previous prime is 1177140071. The next prime is 1177140127. The reversal of 1177140091 is 1900417711.

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

It is a cyclic number.

It is not a de Polignac number, because 1177140091 - 2⁵ = 1177140059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 37972261 = 1177140091 / (1 + 1 + 7 + 7 + 1 + 4 + 0 + 0 + 9 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1177140071) 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, 18986100 + ... + 18986161.

It is an arithmetic number, because the mean of its divisors is an integer number (303778096).

Almost surely, 2^1177140091 is an apocalyptic number.

1177140091 is a deficient number, since it is larger than the sum of its proper divisors (37972293).

1177140091 is an equidigital number, since it uses as much as digits as its factorization.

1177140091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37972292.

The product of its (nonzero) digits is 1764, while the sum is 31.

The square root of 1177140091 is about 34309.4752364416. The cubic root of 1177140091 is about 1055.8674060997.

The spelling of 1177140091 in words is "one billion, one hundred seventy-seven million, one hundred forty thousand, ninety-one".