155979059 has 2 divisors, whose sum is σ = 155979060. Its totient is φ = 155979058.

The previous prime is 155978983. The next prime is 155979071. The reversal of 155979059 is 950979551.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155979059 - 2⁸ = 155978803 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 155978998 and 155979016.

It is not a weakly prime, because it can be changed into another prime (155979079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77989529 + 77989530.

It is an arithmetic number, because the mean of its divisors is an integer number (77989530).

Almost surely, 2^155979059 is an apocalyptic number.

155979059 is a deficient number, since it is larger than the sum of its proper divisors (1).

155979059 is an equidigital number, since it uses as much as digits as its factorization.

155979059 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 637875, while the sum is 50.

The square root of 155979059 is about 12489.1576577446. The cubic root of 155979059 is about 538.2971725549.

The spelling of 155979059 in words is "one hundred fifty-five million, nine hundred seventy-nine thousand, fifty-nine".