97722211 has 2 divisors, whose sum is σ = 97722212. Its totient is φ = 97722210.

The previous prime is 97722203. The next prime is 97722223. The reversal of 97722211 is 11222779.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97722211 - 2³ = 97722203 is a prime.

It is a nialpdrome in base 10.

It is not a weakly prime, because it can be changed into another prime (97722241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48861105 + 48861106.

It is an arithmetic number, because the mean of its divisors is an integer number (48861106).

Almost surely, 2^97722211 is an apocalyptic number.

97722211 is a deficient number, since it is larger than the sum of its proper divisors (1).

97722211 is an equidigital number, since it uses as much as digits as its factorization.

97722211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3528, while the sum is 31.

The square root of 97722211 is about 9885.4545166118. The cubic root of 97722211 is about 460.6075950201.

The spelling of 97722211 in words is "ninety-seven million, seven hundred twenty-two thousand, two hundred eleven".