123770081 has 4 divisors (see below), whose sum is σ = 131050692. Its totient is φ = 116489472.

The previous prime is 123770077. The next prime is 123770083. The reversal of 123770081 is 180077321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 180077321 = 137 ⋅1314433.

It can be written as a sum of positive squares in 2 ways, for example, as 48427681 + 75342400 = 6959^2 + 8680^2 .

It is a cyclic number.

It is not a de Polignac number, because 123770081 - 2² = 123770077 is a prime.

It is a super-2 number, since 2×123770081² = 30638065901493122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123770083) 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, 3640280 + ... + 3640313.

It is an arithmetic number, because the mean of its divisors is an integer number (32762673).

Almost surely, 2^123770081 is an apocalyptic number.

It is an amenable number.

123770081 is a deficient number, since it is larger than the sum of its proper divisors (7280611).

123770081 is an equidigital number, since it uses as much as digits as its factorization.

123770081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7280610.

The product of its (nonzero) digits is 2352, while the sum is 29.

The square root of 123770081 is about 11125.2002678603. The cubic root of 123770081 is about 498.3546999137.

The spelling of 123770081 in words is "one hundred twenty-three million, seven hundred seventy thousand, eighty-one".