71378987 has 2 divisors, whose sum is σ = 71378988. Its totient is φ = 71378986.

The previous prime is 71378963. The next prime is 71379013. The reversal of 71378987 is 78987317.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71378987 - 2¹⁰ = 71377963 is a prime.

It is not a weakly prime, because it can be changed into another prime (71378917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35689493 + 35689494.

It is an arithmetic number, because the mean of its divisors is an integer number (35689494).

Almost surely, 2^71378987 is an apocalyptic number.

71378987 is a deficient number, since it is larger than the sum of its proper divisors (1).

71378987 is an equidigital number, since it uses as much as digits as its factorization.

71378987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 592704, while the sum is 50.

The square root of 71378987 is about 8448.6085836663. The cubic root of 71378987 is about 414.8172360183.

The spelling of 71378987 in words is "seventy-one million, three hundred seventy-eight thousand, nine hundred eighty-seven".