780196987 has 2 divisors, whose sum is σ = 780196988. Its totient is φ = 780196986.

The previous prime is 780196973. The next prime is 780196999. The reversal of 780196987 is 789691087.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 780196987 - 2¹¹ = 780194939 is a prime.

It is not a weakly prime, because it can be changed into another prime (780196927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 390098493 + 390098494.

It is an arithmetic number, because the mean of its divisors is an integer number (390098494).

Almost surely, 2^780196987 is an apocalyptic number.

780196987 is a deficient number, since it is larger than the sum of its proper divisors (1).

780196987 is an equidigital number, since it uses as much as digits as its factorization.

780196987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 55.

The square root of 780196987 is about 27932.0064979228. The cubic root of 780196987 is about 920.5938930820.

The spelling of 780196987 in words is "seven hundred eighty million, one hundred ninety-six thousand, nine hundred eighty-seven".