70921793 has 2 divisors, whose sum is σ = 70921794. Its totient is φ = 70921792.

The previous prime is 70921771. The next prime is 70921801. The reversal of 70921793 is 39712907.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69772609 + 1149184 = 8353^2 + 1072^2 .

It is a cyclic number.

It is not a de Polignac number, because 70921793 - 2⁸ = 70921537 is a prime.

It is not a weakly prime, because it can be changed into another prime (70921693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35460896 + 35460897.

It is an arithmetic number, because the mean of its divisors is an integer number (35460897).

Almost surely, 2^70921793 is an apocalyptic number.

It is an amenable number.

70921793 is a deficient number, since it is larger than the sum of its proper divisors (1).

70921793 is an equidigital number, since it uses as much as digits as its factorization.

70921793 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23814, while the sum is 38.

The square root of 70921793 is about 8421.5077628653. The cubic root of 70921793 is about 413.9296810874.

The spelling of 70921793 in words is "seventy million, nine hundred twenty-one thousand, seven hundred ninety-three".