155423709 has 12 divisors (see below), whose sum is σ = 256572576. Its totient is φ = 88813512.

The previous prime is 155423701. The next prime is 155423747. The reversal of 155423709 is 907324551.

It is not a de Polignac number, because 155423709 - 2³ = 155423701 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155423701) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1233459 + ... + 1233584.

It is an arithmetic number, because the mean of its divisors is an integer number (21381048).

Almost surely, 2^155423709 is an apocalyptic number.

It is an amenable number.

155423709 is a deficient number, since it is larger than the sum of its proper divisors (101148867).

155423709 is a wasteful number, since it uses less digits than its factorization.

155423709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2467056 (or 2467053 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 155423709 is about 12466.9045476413. The cubic root of 155423709 is about 537.6575592900.

The spelling of 155423709 in words is "one hundred fifty-five million, four hundred twenty-three thousand, seven hundred nine".