70693621 has 2 divisors, whose sum is σ = 70693622. Its totient is φ = 70693620.

The previous prime is 70693613. The next prime is 70693627. The reversal of 70693621 is 12639607.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40322500 + 30371121 = 6350^2 + 5511^2 .

It is a cyclic number.

It is not a de Polignac number, because 70693621 - 2³ = 70693613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70693627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35346810 + 35346811.

It is an arithmetic number, because the mean of its divisors is an integer number (35346811).

Almost surely, 2^70693621 is an apocalyptic number.

It is an amenable number.

70693621 is a deficient number, since it is larger than the sum of its proper divisors (1).

70693621 is an equidigital number, since it uses as much as digits as its factorization.

70693621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 70693621 is about 8407.9498690228. The cubic root of 70693621 is about 413.4853013144.

The spelling of 70693621 in words is "seventy million, six hundred ninety-three thousand, six hundred twenty-one".