407220197 has 2 divisors, whose sum is σ = 407220198. Its totient is φ = 407220196.

The previous prime is 407220137. The next prime is 407220211. The reversal of 407220197 is 791022704.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 398641156 + 8579041 = 19966^2 + 2929^2 .

It is a cyclic number.

It is not a de Polignac number, because 407220197 - 2⁶ = 407220133 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (407220127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203610098 + 203610099.

It is an arithmetic number, because the mean of its divisors is an integer number (203610099).

Almost surely, 2^407220197 is an apocalyptic number.

It is an amenable number.

407220197 is a deficient number, since it is larger than the sum of its proper divisors (1).

407220197 is an equidigital number, since it uses as much as digits as its factorization.

407220197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 407220197 is about 20179.6976439192. The cubic root of 407220197 is about 741.2131288541.

The spelling of 407220197 in words is "four hundred seven million, two hundred twenty thousand, one hundred ninety-seven".