73000155 has 8 divisors (see below), whose sum is σ = 116800272. Its totient is φ = 38933408.

The previous prime is 73000153. The next prime is 73000157. The reversal of 73000155 is 55100037.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (73000153) and next prime (73000157).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 73000155 - 2¹ = 73000153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73000153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2433324 + ... + 2433353.

It is an arithmetic number, because the mean of its divisors is an integer number (14600034).

Almost surely, 2^73000155 is an apocalyptic number.

73000155 is a deficient number, since it is larger than the sum of its proper divisors (43800117).

73000155 is a wasteful number, since it uses less digits than its factorization.

73000155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4866685.

The product of its (nonzero) digits is 525, while the sum is 21.

The square root of 73000155 is about 8544.0128160016. The cubic root of 73000155 is about 417.9342154359.

The spelling of 73000155 in words is "seventy-three million, one hundred fifty-five", and thus it is an aban number.