139474213 has 2 divisors, whose sum is σ = 139474214. Its totient is φ = 139474212.

The previous prime is 139474189. The next prime is 139474219. The reversal of 139474213 is 312474931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 123609924 + 15864289 = 11118^2 + 3983^2 .

It is a cyclic number.

It is not a de Polignac number, because 139474213 - 2⁹ = 139473701 is a prime.

It is equal to p_7884115 and since 139474213 and 7884115 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (139474219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69737106 + 69737107.

It is an arithmetic number, because the mean of its divisors is an integer number (69737107).

Almost surely, 2^139474213 is an apocalyptic number.

It is an amenable number.

139474213 is a deficient number, since it is larger than the sum of its proper divisors (1).

139474213 is an equidigital number, since it uses as much as digits as its factorization.

139474213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 34.

The square root of 139474213 is about 11809.9201098060. The cubic root of 139474213 is about 518.5985599843.

The spelling of 139474213 in words is "one hundred thirty-nine million, four hundred seventy-four thousand, two hundred thirteen".