123897945 has 16 divisors (see below), whose sum is σ = 198959040. Its totient is φ = 65838144.

The previous prime is 123897923. The next prime is 123897967. The reversal of 123897945 is 549798321.

It is an interprime number because it is at equal distance from previous prime (123897923) and next prime (123897967).

It is not a de Polignac number, because 123897945 - 2⁵ = 123897913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123897894 and 123897903.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10755 + ... + 19064.

It is an arithmetic number, because the mean of its divisors is an integer number (12434940).

Almost surely, 2^123897945 is an apocalyptic number.

123897945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

123897945 is a deficient number, since it is larger than the sum of its proper divisors (75061095).

123897945 is a wasteful number, since it uses less digits than its factorization.

123897945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30104.

The product of its digits is 544320, while the sum is 48.

The square root of 123897945 is about 11130.9453776398. The cubic root of 123897945 is about 498.5262537451.

The spelling of 123897945 in words is "one hundred twenty-three million, eight hundred ninety-seven thousand, nine hundred forty-five".