70694521 has 2 divisors, whose sum is σ = 70694522. Its totient is φ = 70694520.

The previous prime is 70694513. The next prime is 70694597. The reversal of 70694521 is 12549607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41100921 + 29593600 = 6411^2 + 5440^2 .

It is a cyclic number.

It is not a de Polignac number, because 70694521 - 2³ = 70694513 is a prime.

It is not a weakly prime, because it can be changed into another prime (70694321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35347260 + 35347261.

It is an arithmetic number, because the mean of its divisors is an integer number (35347261).

Almost surely, 2^70694521 is an apocalyptic number.

It is an amenable number.

70694521 is a deficient number, since it is larger than the sum of its proper divisors (1).

70694521 is an equidigital number, since it uses as much as digits as its factorization.

70694521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 70694521 is about 8408.0033896282. The cubic root of 70694521 is about 413.4870559998.

The spelling of 70694521 in words is "seventy million, six hundred ninety-four thousand, five hundred twenty-one".