123155077 has 4 divisors (see below), whose sum is σ = 123186700. Its totient is φ = 123123456.

The previous prime is 123155069. The next prime is 123155099. The reversal of 123155077 is 770551321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 770551321 = 101 ⋅7629221.

It can be written as a sum of positive squares in 2 ways, for example, as 76492516 + 46662561 = 8746^2 + 6831^2 .

It is a cyclic number.

It is not a de Polignac number, because 123155077 - 2³ = 123155069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123155047) 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, 8988 + ... + 18085.

It is an arithmetic number, because the mean of its divisors is an integer number (30796675).

Almost surely, 2^123155077 is an apocalyptic number.

It is an amenable number.

123155077 is a deficient number, since it is larger than the sum of its proper divisors (31623).

123155077 is an equidigital number, since it uses as much as digits as its factorization.

123155077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31622.

The product of its (nonzero) digits is 7350, while the sum is 31.

The square root of 123155077 is about 11097.5257152214. The cubic root of 123155077 is about 497.5279002560.

The spelling of 123155077 in words is "one hundred twenty-three million, one hundred fifty-five thousand, seventy-seven".