405402197 has 2 divisors, whose sum is σ = 405402198. Its totient is φ = 405402196.

The previous prime is 405402187. The next prime is 405402211. The reversal of 405402197 is 791204504.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 402965476 + 2436721 = 20074^2 + 1561^2 .

It is a cyclic number.

It is not a de Polignac number, because 405402197 - 2⁶ = 405402133 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 (405402187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202701098 + 202701099.

It is an arithmetic number, because the mean of its divisors is an integer number (202701099).

Almost surely, 2^405402197 is an apocalyptic number.

It is an amenable number.

405402197 is a deficient number, since it is larger than the sum of its proper divisors (1).

405402197 is an equidigital number, since it uses as much as digits as its factorization.

405402197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 405402197 is about 20134.6019826566. The cubic root of 405402197 is about 740.1084556158.

The spelling of 405402197 in words is "four hundred five million, four hundred two thousand, one hundred ninety-seven".