117628531 has 4 divisors (see below), whose sum is σ = 117783864. Its totient is φ = 117473200.

The previous prime is 117628517. The next prime is 117628561. The reversal of 117628531 is 135826711.

It is a happy number.

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 117628531 - 2⁵ = 117628499 is a prime.

It is a super-2 number, since 2×117628531² = 27672942610435922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117628561) 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, 76525 + ... + 78046.

It is an arithmetic number, because the mean of its divisors is an integer number (29445966).

Almost surely, 2^117628531 is an apocalyptic number.

117628531 is a deficient number, since it is larger than the sum of its proper divisors (155333).

117628531 is an equidigital number, since it uses as much as digits as its factorization.

117628531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155332.

The product of its digits is 10080, while the sum is 34.

The square root of 117628531 is about 10845.6687668396. The cubic root of 117628531 is about 489.9715810257.

The spelling of 117628531 in words is "one hundred seventeen million, six hundred twenty-eight thousand, five hundred thirty-one".