70565987 has 2 divisors, whose sum is σ = 70565988. Its totient is φ = 70565986.

The previous prime is 70565983. The next prime is 70566007. The reversal of 70565987 is 78956507.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70565987 - 2² = 70565983 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70565983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35282993 + 35282994.

It is an arithmetic number, because the mean of its divisors is an integer number (35282994).

Almost surely, 2^70565987 is an apocalyptic number.

70565987 is a deficient number, since it is larger than the sum of its proper divisors (1).

70565987 is an equidigital number, since it uses as much as digits as its factorization.

70565987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529200, while the sum is 47.

The square root of 70565987 is about 8400.3563614885. The cubic root of 70565987 is about 413.2363086665.

The spelling of 70565987 in words is "seventy million, five hundred sixty-five thousand, nine hundred eighty-seven".