70821383 has 2 divisors, whose sum is σ = 70821384. Its totient is φ = 70821382.

The previous prime is 70821313. The next prime is 70821403. The reversal of 70821383 is 38312807.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70821383 - 2¹⁶ = 70755847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70821313) 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, 35410691 + 35410692.

It is an arithmetic number, because the mean of its divisors is an integer number (35410692).

Almost surely, 2^70821383 is an apocalyptic number.

70821383 is a deficient number, since it is larger than the sum of its proper divisors (1).

70821383 is an equidigital number, since it uses as much as digits as its factorization.

70821383 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 32.

The square root of 70821383 is about 8415.5441297637. The cubic root of 70821383 is about 413.7342437022.

The spelling of 70821383 in words is "seventy million, eight hundred twenty-one thousand, three hundred eighty-three".