117281386 has 4 divisors (see below), whose sum is σ = 175922082. Its totient is φ = 58640692.

The previous prime is 117281383. The next prime is 117281387. The reversal of 117281386 is 683182711.

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

It can be written as a sum of positive squares in only one way, i.e., 76895361 + 40386025 = 8769^2 + 6355^2 .

It is not an unprimeable number, because it can be changed into a prime (117281383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 29320345 + ... + 29320348.

Almost surely, 2^117281386 is an apocalyptic number.

117281386 is a deficient number, since it is larger than the sum of its proper divisors (58640696).

117281386 is an equidigital number, since it uses as much as digits as its factorization.

117281386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58640695.

The product of its digits is 16128, while the sum is 37.

The square root of 117281386 is about 10829.6530877032. The cubic root of 117281386 is about 489.4891051554.

The spelling of 117281386 in words is "one hundred seventeen million, two hundred eighty-one thousand, three hundred eighty-six".