166939093 has 2 divisors, whose sum is σ = 166939094. Its totient is φ = 166939092.

The previous prime is 166939067. The next prime is 166939103. The reversal of 166939093 is 390939661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165842884 + 1096209 = 12878^2 + 1047^2 .

It is a cyclic number.

It is not a de Polignac number, because 166939093 - 2¹³ = 166930901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (166939033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83469546 + 83469547.

It is an arithmetic number, because the mean of its divisors is an integer number (83469547).

Almost surely, 2^166939093 is an apocalyptic number.

It is an amenable number.

166939093 is a deficient number, since it is larger than the sum of its proper divisors (1).

166939093 is an equidigital number, since it uses as much as digits as its factorization.

166939093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 236196, while the sum is 46.

The square root of 166939093 is about 12920.4912058327. The cubic root of 166939093 is about 550.6208889043.

The spelling of 166939093 in words is "one hundred sixty-six million, nine hundred thirty-nine thousand, ninety-three".