970061221 has 2 divisors, whose sum is σ = 970061222. Its totient is φ = 970061220.

The previous prime is 970061137. The next prime is 970061231. The reversal of 970061221 is 122160079.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 925984900 + 44076321 = 30430^2 + 6639^2 .

It is a cyclic number.

It is not a de Polignac number, because 970061221 - 2¹¹ = 970059173 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 970061221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (970061231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485030610 + 485030611.

It is an arithmetic number, because the mean of its divisors is an integer number (485030611).

Almost surely, 2^970061221 is an apocalyptic number.

It is an amenable number.

970061221 is a deficient number, since it is larger than the sum of its proper divisors (1).

970061221 is an equidigital number, since it uses as much as digits as its factorization.

970061221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 970061221 is about 31145.8058332097. The cubic root of 970061221 is about 989.9191244343.

The spelling of 970061221 in words is "nine hundred seventy million, sixty-one thousand, two hundred twenty-one".