155349893 has 4 divisors (see below), whose sum is σ = 164488140. Its totient is φ = 146211648.

The previous prime is 155349881. The next prime is 155349907. The reversal of 155349893 is 398943551.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49815364 + 105534529 = 7058^2 + 10273^2 .

It is a cyclic number.

It is not a de Polignac number, because 155349893 - 2⁴ = 155349877 is a prime.

It is a super-2 number, since 2×155349893² = 48267178510222898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155349823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4569098 + ... + 4569131.

It is an arithmetic number, because the mean of its divisors is an integer number (41122035).

Almost surely, 2^155349893 is an apocalyptic number.

It is an amenable number.

155349893 is a deficient number, since it is larger than the sum of its proper divisors (9138247).

155349893 is an equidigital number, since it uses as much as digits as its factorization.

155349893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9138246.

The product of its digits is 583200, while the sum is 47.

The square root of 155349893 is about 12463.9437177805. The cubic root of 155349893 is about 537.5724285307.

The spelling of 155349893 in words is "one hundred fifty-five million, three hundred forty-nine thousand, eight hundred ninety-three".