70195621 has 2 divisors, whose sum is σ = 70195622. Its totient is φ = 70195620.

The previous prime is 70195613. The next prime is 70195637. The reversal of 70195621 is 12659107.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59213025 + 10982596 = 7695^2 + 3314^2 .

It is a cyclic number.

It is not a de Polignac number, because 70195621 - 2³ = 70195613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70195721) 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, 35097810 + 35097811.

It is an arithmetic number, because the mean of its divisors is an integer number (35097811).

Almost surely, 2^70195621 is an apocalyptic number.

It is an amenable number.

70195621 is a deficient number, since it is larger than the sum of its proper divisors (1).

70195621 is an equidigital number, since it uses as much as digits as its factorization.

70195621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 70195621 is about 8378.2826999332. The cubic root of 70195621 is about 412.5120824132.

The spelling of 70195621 in words is "seventy million, one hundred ninety-five thousand, six hundred twenty-one".