155104993 has 8 divisors (see below), whose sum is σ = 156922920. Its totient is φ = 153292800.

The previous prime is 155104981. The next prime is 155105051. The reversal of 155104993 is 399401551.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15108769 + 139996224 = 3887^2 + 11832^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-155104993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (155104903) 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, 76671 + ... + 78667.

It is an arithmetic number, because the mean of its divisors is an integer number (19615365).

Almost surely, 2^155104993 is an apocalyptic number.

It is an amenable number.

155104993 is a deficient number, since it is larger than the sum of its proper divisors (1817927).

155104993 is a wasteful number, since it uses less digits than its factorization.

155104993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2867.

The product of its (nonzero) digits is 24300, while the sum is 37.

The square root of 155104993 is about 12454.1155045230. The cubic root of 155104993 is about 537.2897961535.

It can be divided in two parts, 15510 and 4993, that added together give a triangular number (20503 = T₂₀₂).

The spelling of 155104993 in words is "one hundred fifty-five million, one hundred four thousand, nine hundred ninety-three".