116721487 has 4 divisors (see below), whose sum is σ = 118635016. Its totient is φ = 114807960.

The previous prime is 116721461. The next prime is 116721511. The reversal of 116721487 is 784127611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 784127611 = 61 ⋅12854551.

It is a cyclic number.

It is not a de Polignac number, because 116721487 - 2⁷ = 116721359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (116721457) 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, 956673 + ... + 956794.

It is an arithmetic number, because the mean of its divisors is an integer number (29658754).

Almost surely, 2^116721487 is an apocalyptic number.

116721487 is a deficient number, since it is larger than the sum of its proper divisors (1913529).

116721487 is an equidigital number, since it uses as much as digits as its factorization.

116721487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1913528.

The product of its digits is 18816, while the sum is 37.

The square root of 116721487 is about 10803.7718876326. The cubic root of 116721487 is about 488.7089252356.

The spelling of 116721487 in words is "one hundred sixteen million, seven hundred twenty-one thousand, four hundred eighty-seven".