391414123 has 2 divisors, whose sum is σ = 391414124. Its totient is φ = 391414122.

The previous prime is 391414061. The next prime is 391414147. The reversal of 391414123 is 321414193.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-391414123 is a prime.

It is equal to p_20902546 and since 391414123 and 20902546 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 391414091 and 391414100.

It is not a weakly prime, because it can be changed into another prime (391414183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 195707061 + 195707062.

It is an arithmetic number, because the mean of its divisors is an integer number (195707062).

Almost surely, 2^391414123 is an apocalyptic number.

391414123 is a deficient number, since it is larger than the sum of its proper divisors (1).

391414123 is an equidigital number, since it uses as much as digits as its factorization.

391414123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 28.

The square root of 391414123 is about 19784.1887122015. The cubic root of 391414123 is about 731.4963508447.

It can be divided in two parts, 39141 and 4123, that added together give a square (43264 = 208²).

The spelling of 391414123 in words is "three hundred ninety-one million, four hundred fourteen thousand, one hundred twenty-three".