427166309 has 2 divisors, whose sum is σ = 427166310. Its totient is φ = 427166308.

The previous prime is 427166279. The next prime is 427166323. The reversal of 427166309 is 903661724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 294225409 + 132940900 = 17153^2 + 11530^2 .

It is a cyclic number.

It is not a de Polignac number, because 427166309 - 2⁸ = 427166053 is a prime.

It is a super-4 number, since 4×427166309⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427166809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213583154 + 213583155.

It is an arithmetic number, because the mean of its divisors is an integer number (213583155).

Almost surely, 2^427166309 is an apocalyptic number.

It is an amenable number.

427166309 is a deficient number, since it is larger than the sum of its proper divisors (1).

427166309 is an equidigital number, since it uses as much as digits as its factorization.

427166309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 427166309 is about 20668.0020563188. The cubic root of 427166309 is about 753.1225718694.

The spelling of 427166309 in words is "four hundred twenty-seven million, one hundred sixty-six thousand, three hundred nine".