155000039 has 2 divisors, whose sum is σ = 155000040. Its totient is φ = 155000038.

The previous prime is 155000023. The next prime is 155000047. The reversal of 155000039 is 930000551.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 155000039 - 2⁴ = 155000023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 154999978 and 155000023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (155000239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77500019 + 77500020.

It is an arithmetic number, because the mean of its divisors is an integer number (77500020).

Almost surely, 2^155000039 is an apocalyptic number.

155000039 is a deficient number, since it is larger than the sum of its proper divisors (1).

155000039 is an equidigital number, since it uses as much as digits as its factorization.

155000039 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 675, while the sum is 23.

The square root of 155000039 is about 12449.9011642663. The cubic root of 155000039 is about 537.1685805473.

The spelling of 155000039 in words is "one hundred fifty-five million, thirty-nine", and thus it is an aban number.