196801987 has 2 divisors, whose sum is σ = 196801988. Its totient is φ = 196801986.

The previous prime is 196801967. The next prime is 196801991. The reversal of 196801987 is 789108691.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-196801987 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 196801987.

It is not a weakly prime, because it can be changed into another prime (196801937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98400993 + 98400994.

It is an arithmetic number, because the mean of its divisors is an integer number (98400994).

Almost surely, 2^196801987 is an apocalyptic number.

196801987 is a deficient number, since it is larger than the sum of its proper divisors (1).

196801987 is an equidigital number, since it uses as much as digits as its factorization.

196801987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 196801987 is about 14028.6131531239. The cubic root of 196801987 is about 581.6697691242.

The spelling of 196801987 in words is "one hundred ninety-six million, eight hundred one thousand, nine hundred eighty-seven".