116821651 has 2 divisors, whose sum is σ = 116821652. Its totient is φ = 116821650.

The previous prime is 116821643. The next prime is 116821687. The reversal of 116821651 is 156128611.

It is a weak prime.

It is an emirp because it is prime and its reverse (156128611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 116821651 - 2³ = 116821643 is a prime.

It is not a weakly prime, because it can be changed into another prime (116821951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58410825 + 58410826.

It is an arithmetic number, because the mean of its divisors is an integer number (58410826).

Almost surely, 2^116821651 is an apocalyptic number.

116821651 is a deficient number, since it is larger than the sum of its proper divisors (1).

116821651 is an equidigital number, since it uses as much as digits as its factorization.

116821651 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 31.

The square root of 116821651 is about 10808.4064967968. The cubic root of 116821651 is about 488.8486796954.

The spelling of 116821651 in words is "one hundred sixteen million, eight hundred twenty-one thousand, six hundred fifty-one".