402166273 has 2 divisors, whose sum is σ = 402166274. Its totient is φ = 402166272.

The previous prime is 402166267. The next prime is 402166309. The reversal of 402166273 is 372661204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267420609 + 134745664 = 16353^2 + 11608^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402166273 is a prime.

It is a super-2 number, since 2×402166273² = 323475422277421058, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (402161273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201083136 + 201083137.

It is an arithmetic number, because the mean of its divisors is an integer number (201083137).

Almost surely, 2^402166273 is an apocalyptic number.

It is an amenable number.

402166273 is a deficient number, since it is larger than the sum of its proper divisors (1).

402166273 is an equidigital number, since it uses as much as digits as its factorization.

402166273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 402166273 is about 20054.0836988380. The cubic root of 402166273 is about 738.1340087824.

The spelling of 402166273 in words is "four hundred two million, one hundred sixty-six thousand, two hundred seventy-three".