70853987 has 2 divisors, whose sum is σ = 70853988. Its totient is φ = 70853986.

The previous prime is 70853969. The next prime is 70854023. The reversal of 70853987 is 78935807.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70853987 - 2¹⁰ = 70852963 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70853917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35426993 + 35426994.

It is an arithmetic number, because the mean of its divisors is an integer number (35426994).

Almost surely, 2^70853987 is an apocalyptic number.

70853987 is a deficient number, since it is larger than the sum of its proper divisors (1).

70853987 is an equidigital number, since it uses as much as digits as its factorization.

70853987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 423360, while the sum is 47.

The square root of 70853987 is about 8417.4810365097. The cubic root of 70853987 is about 413.7977241616.

The spelling of 70853987 in words is "seventy million, eight hundred fifty-three thousand, nine hundred eighty-seven".