17139457 has 4 divisors (see below), whose sum is σ = 17149396. Its totient is φ = 17129520.

The previous prime is 17139449. The next prime is 17139461. The reversal of 17139457 is 75493171.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75493171 = 13 ⋅5807167.

It can be written as a sum of positive squares in 2 ways, for example, as 10042561 + 7096896 = 3169^2 + 2664^2 .

It is a cyclic number.

It is not a de Polignac number, because 17139457 - 2³ = 17139449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17139467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1638 + ... + 6079.

It is an arithmetic number, because the mean of its divisors is an integer number (4287349).

Almost surely, 2^17139457 is an apocalyptic number.

It is an amenable number.

17139457 is a deficient number, since it is larger than the sum of its proper divisors (9939).

17139457 is an equidigital number, since it uses as much as digits as its factorization.

17139457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9938.

The product of its digits is 26460, while the sum is 37.

The square root of 17139457 is about 4139.9827294326. The cubic root of 17139457 is about 257.8293495226.

The spelling of 17139457 in words is "seventeen million, one hundred thirty-nine thousand, four hundred fifty-seven".