113321987 has 2 divisors, whose sum is σ = 113321988. Its totient is φ = 113321986.

The previous prime is 113321969. The next prime is 113321993. The reversal of 113321987 is 789123311.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (789123311) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113321987 is a prime.

It is not a weakly prime, because it can be changed into another prime (113321917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56660993 + 56660994.

It is an arithmetic number, because the mean of its divisors is an integer number (56660994).

Almost surely, 2^113321987 is an apocalyptic number.

113321987 is a deficient number, since it is larger than the sum of its proper divisors (1).

113321987 is an equidigital number, since it uses as much as digits as its factorization.

113321987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 35.

The square root of 113321987 is about 10645.2800338930. The cubic root of 113321987 is about 483.9175732752.

The spelling of 113321987 in words is "one hundred thirteen million, three hundred twenty-one thousand, nine hundred eighty-seven".