70218887 has 2 divisors, whose sum is σ = 70218888. Its totient is φ = 70218886.

The previous prime is 70218847. The next prime is 70218899. The reversal of 70218887 is 78881207.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70218887 - 2¹⁶ = 70153351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70218847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35109443 + 35109444.

It is an arithmetic number, because the mean of its divisors is an integer number (35109444).

Almost surely, 2^70218887 is an apocalyptic number.

70218887 is a deficient number, since it is larger than the sum of its proper divisors (1).

70218887 is an equidigital number, since it uses as much as digits as its factorization.

70218887 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50176, while the sum is 41.

The square root of 70218887 is about 8379.6710555964. The cubic root of 70218887 is about 412.5576524255.

The spelling of 70218887 in words is "seventy million, two hundred eighteen thousand, eight hundred eighty-seven".