116649721 has 8 divisors (see below), whose sum is σ = 128128320. Its totient is φ = 105705072.

The previous prime is 116649713. The next prime is 116649727. The reversal of 116649721 is 127946611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 116649721 - 2³ = 116649713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (116649727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133030 + ... + 133903.

It is an arithmetic number, because the mean of its divisors is an integer number (16016040).

Almost surely, 2^116649721 is an apocalyptic number.

It is an amenable number.

116649721 is a deficient number, since it is larger than the sum of its proper divisors (11478599).

116649721 is a wasteful number, since it uses less digits than its factorization.

116649721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266975.

The product of its digits is 18144, while the sum is 37.

The square root of 116649721 is about 10800.4500369198. The cubic root of 116649721 is about 488.6087440944.

It can be divided in two parts, 116649 and 721, that added together give a triangular number (117370 = T₄₈₄).

The spelling of 116649721 in words is "one hundred sixteen million, six hundred forty-nine thousand, seven hundred twenty-one".