70199621 has 2 divisors, whose sum is σ = 70199622. Its totient is φ = 70199620.

The previous prime is 70199609. The next prime is 70199629. The reversal of 70199621 is 12699107.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35224225 + 34975396 = 5935^2 + 5914^2 .

It is an emirp because it is prime and its reverse (12699107) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70199621 - 2²⁶ = 3090757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70199629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35099810 + 35099811.

It is an arithmetic number, because the mean of its divisors is an integer number (35099811).

Almost surely, 2^70199621 is an apocalyptic number.

It is an amenable number.

70199621 is a deficient number, since it is larger than the sum of its proper divisors (1).

70199621 is an equidigital number, since it uses as much as digits as its factorization.

70199621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 70199621 is about 8378.5214089361. The cubic root of 70199621 is about 412.5199177404.

The spelling of 70199621 in words is "seventy million, one hundred ninety-nine thousand, six hundred twenty-one".