70898647 has 2 divisors, whose sum is σ = 70898648. Its totient is φ = 70898646.

The previous prime is 70898621. The next prime is 70898651. The reversal of 70898647 is 74689807.

It is a strong prime.

It is an emirp because it is prime and its reverse (74689807) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70898647 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70898647.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70898617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35449323 + 35449324.

It is an arithmetic number, because the mean of its divisors is an integer number (35449324).

Almost surely, 2^70898647 is an apocalyptic number.

70898647 is a deficient number, since it is larger than the sum of its proper divisors (1).

70898647 is an equidigital number, since it uses as much as digits as its factorization.

70898647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 70898647 is about 8420.1334312468. The cubic root of 70898647 is about 413.8846462284.

The spelling of 70898647 in words is "seventy million, eight hundred ninety-eight thousand, six hundred forty-seven".