117779397 has 4 divisors (see below), whose sum is σ = 157039200. Its totient is φ = 78519596.

The previous prime is 117779393. The next prime is 117779401. The reversal of 117779397 is 793977711.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (117779393) and next prime (117779401).

It is a cyclic number.

It is not a de Polignac number, because 117779397 - 2² = 117779393 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117779393) 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, 19629897 + ... + 19629902.

It is an arithmetic number, because the mean of its divisors is an integer number (39259800).

Almost surely, 2^117779397 is an apocalyptic number.

It is an amenable number.

117779397 is a deficient number, since it is larger than the sum of its proper divisors (39259803).

117779397 is an equidigital number, since it uses as much as digits as its factorization.

117779397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39259802.

The product of its digits is 583443, while the sum is 51.

The square root of 117779397 is about 10852.6216648329. The cubic root of 117779397 is about 490.1809646733.

The spelling of 117779397 in words is "one hundred seventeen million, seven hundred seventy-nine thousand, three hundred ninety-seven".