78571123 has 2 divisors, whose sum is σ = 78571124. Its totient is φ = 78571122.

The previous prime is 78571057. The next prime is 78571133. The reversal of 78571123 is 32117587.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78571123 is a prime.

It is a super-2 number, since 2×78571123² = 12346842738962258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78571133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39285561 + 39285562.

It is an arithmetic number, because the mean of its divisors is an integer number (39285562).

Almost surely, 2^78571123 is an apocalyptic number.

78571123 is a deficient number, since it is larger than the sum of its proper divisors (1).

78571123 is an equidigital number, since it uses as much as digits as its factorization.

78571123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11760, while the sum is 34.

The square root of 78571123 is about 8864.0353677092. The cubic root of 78571123 is about 428.3061595941.

The spelling of 78571123 in words is "seventy-eight million, five hundred seventy-one thousand, one hundred twenty-three".