70209101 has 2 divisors, whose sum is σ = 70209102. Its totient is φ = 70209100.

The previous prime is 70209049. The next prime is 70209103. The reversal of 70209101 is 10190207.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63186601 + 7022500 = 7949^2 + 2650^2 .

It is a cyclic number.

It is not a de Polignac number, because 70209101 - 2⁶ = 70209037 is a prime.

Together with 70209103, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70209103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35104550 + 35104551.

It is an arithmetic number, because the mean of its divisors is an integer number (35104551).

Almost surely, 2^70209101 is an apocalyptic number.

It is an amenable number.

70209101 is a deficient number, since it is larger than the sum of its proper divisors (1).

70209101 is an equidigital number, since it uses as much as digits as its factorization.

70209101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 20.

The square root of 70209101 is about 8379.0871221154. The cubic root of 70209101 is about 412.5384862775.

Adding to 70209101 its reverse (10190207), we get a palindrome (80399308).

The spelling of 70209101 in words is "seventy million, two hundred nine thousand, one hundred one".