70621843 has 2 divisors, whose sum is σ = 70621844. Its totient is φ = 70621842.

The previous prime is 70621807. The next prime is 70621861. The reversal of 70621843 is 34812607.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70621843 is a prime.

It is not a weakly prime, because it can be changed into another prime (70621883) 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, 35310921 + 35310922.

It is an arithmetic number, because the mean of its divisors is an integer number (35310922).

Almost surely, 2^70621843 is an apocalyptic number.

70621843 is a deficient number, since it is larger than the sum of its proper divisors (1).

70621843 is an equidigital number, since it uses as much as digits as its factorization.

70621843 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 70621843 is about 8403.6803247149. The cubic root of 70621843 is about 413.3453113219.

The spelling of 70621843 in words is "seventy million, six hundred twenty-one thousand, eight hundred forty-three".