123495681 has 4 divisors (see below), whose sum is σ = 164660912. Its totient is φ = 82330452.

The previous prime is 123495637. The next prime is 123495683. The reversal of 123495681 is 186594321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 123495681 - 2¹¹ = 123493633 is a prime.

It is a super-2 number, since 2×123495681² = 30502366451307522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123495683) 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, 20582611 + ... + 20582616.

It is an arithmetic number, because the mean of its divisors is an integer number (41165228).

Almost surely, 2^123495681 is an apocalyptic number.

It is an amenable number.

123495681 is a deficient number, since it is larger than the sum of its proper divisors (41165231).

123495681 is an equidigital number, since it uses as much as digits as its factorization.

123495681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41165230.

The product of its digits is 51840, while the sum is 39.

The square root of 123495681 is about 11112.8610627507. The cubic root of 123495681 is about 497.9861409669.

The spelling of 123495681 in words is "one hundred twenty-three million, four hundred ninety-five thousand, six hundred eighty-one".