70385891 has 2 divisors, whose sum is σ = 70385892. Its totient is φ = 70385890.

The previous prime is 70385881. The next prime is 70385897. The reversal of 70385891 is 19858307.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70385891 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70385897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35192945 + 35192946.

It is an arithmetic number, because the mean of its divisors is an integer number (35192946).

Almost surely, 2^70385891 is an apocalyptic number.

70385891 is a deficient number, since it is larger than the sum of its proper divisors (1).

70385891 is an equidigital number, since it uses as much as digits as its factorization.

70385891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 41.

The square root of 70385891 is about 8389.6299680022. The cubic root of 70385891 is about 412.8844601727.

The spelling of 70385891 in words is "seventy million, three hundred eighty-five thousand, eight hundred ninety-one".