78353129 has 2 divisors, whose sum is σ = 78353130. Its totient is φ = 78353128.

The previous prime is 78353117. The next prime is 78353141. The reversal of 78353129 is 92135387.

It is a balanced prime because it is at equal distance from previous prime (78353117) and next prime (78353141).

It can be written as a sum of positive squares in only one way, i.e., 76597504 + 1755625 = 8752^2 + 1325^2 .

It is a cyclic number.

It is not a de Polignac number, because 78353129 - 2²⁰ = 77304553 is a prime.

It is a super-2 number, since 2×78353129² = 12278425648181282, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 78353092 and 78353101.

It is not a weakly prime, because it can be changed into another prime (78353179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39176564 + 39176565.

It is an arithmetic number, because the mean of its divisors is an integer number (39176565).

Almost surely, 2^78353129 is an apocalyptic number.

It is an amenable number.

78353129 is a deficient number, since it is larger than the sum of its proper divisors (1).

78353129 is an equidigital number, since it uses as much as digits as its factorization.

78353129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 45360, while the sum is 38.

The square root of 78353129 is about 8851.7302828317. The cubic root of 78353129 is about 427.9096837553.

The spelling of 78353129 in words is "seventy-eight million, three hundred fifty-three thousand, one hundred twenty-nine".