139571417 has 2 divisors, whose sum is σ = 139571418. Its totient is φ = 139571416.

The previous prime is 139571387. The next prime is 139571431. The reversal of 139571417 is 714175931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102799321 + 36772096 = 10139^2 + 6064^2 .

It is a cyclic number.

It is not a de Polignac number, because 139571417 - 2¹⁶ = 139505881 is a prime.

It is not a weakly prime, because it can be changed into another prime (139571317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69785708 + 69785709.

It is an arithmetic number, because the mean of its divisors is an integer number (69785709).

Almost surely, 2^139571417 is an apocalyptic number.

It is an amenable number.

139571417 is a deficient number, since it is larger than the sum of its proper divisors (1).

139571417 is an equidigital number, since it uses as much as digits as its factorization.

139571417 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26460, while the sum is 38.

The square root of 139571417 is about 11814.0347468593. The cubic root of 139571417 is about 518.7190079322.

The spelling of 139571417 in words is "one hundred thirty-nine million, five hundred seventy-one thousand, four hundred seventeen".