70531787 has 2 divisors, whose sum is σ = 70531788. Its totient is φ = 70531786.

The previous prime is 70531757. The next prime is 70531801. The reversal of 70531787 is 78713507.

It is a strong prime.

It is an emirp because it is prime and its reverse (78713507) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70531787 - 2¹⁶ = 70466251 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70531787.

It is not a weakly prime, because it can be changed into another prime (70531757) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35265893 + 35265894.

It is an arithmetic number, because the mean of its divisors is an integer number (35265894).

Almost surely, 2^70531787 is an apocalyptic number.

70531787 is a deficient number, since it is larger than the sum of its proper divisors (1).

70531787 is an equidigital number, since it uses as much as digits as its factorization.

70531787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 41160, while the sum is 38.

The square root of 70531787 is about 8398.3204868593. The cubic root of 70531787 is about 413.1695391736.

The spelling of 70531787 in words is "seventy million, five hundred thirty-one thousand, seven hundred eighty-seven".