155939459 has 4 divisors (see below), whose sum is σ = 167934816. Its totient is φ = 143944104.

The previous prime is 155939449. The next prime is 155939473. The reversal of 155939459 is 954939551.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 954939551 = 1613 ⋅592027.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155939459 is a prime.

It is a super-2 number, since 2×155939459² = 48634229746425362, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155939449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5997659 + ... + 5997684.

It is an arithmetic number, because the mean of its divisors is an integer number (41983704).

Almost surely, 2^155939459 is an apocalyptic number.

155939459 is a deficient number, since it is larger than the sum of its proper divisors (11995357).

155939459 is a wasteful number, since it uses less digits than its factorization.

155939459 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11995356.

The product of its digits is 1093500, while the sum is 50.

The square root of 155939459 is about 12487.5721819736. The cubic root of 155939459 is about 538.2516143619.

It can be divided in two parts, 15593 and 9459, that added together give a palindrome (25052).

The spelling of 155939459 in words is "one hundred fifty-five million, nine hundred thirty-nine thousand, four hundred fifty-nine".