78325153 has 2 divisors, whose sum is σ = 78325154. Its totient is φ = 78325152.

The previous prime is 78325109. The next prime is 78325183. The reversal of 78325153 is 35152387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 77228944 + 1096209 = 8788^2 + 1047^2 .

It is an emirp because it is prime and its reverse (35152387) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78325153 is a prime.

It is a super-2 number, since 2×78325153² = 12269659184946818, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78325183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39162576 + 39162577.

It is an arithmetic number, because the mean of its divisors is an integer number (39162577).

Almost surely, 2^78325153 is an apocalyptic number.

It is an amenable number.

78325153 is a deficient number, since it is larger than the sum of its proper divisors (1).

78325153 is an equidigital number, since it uses as much as digits as its factorization.

78325153 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 34.

The square root of 78325153 is about 8850.1498857364. The cubic root of 78325153 is about 427.8587492808.

The spelling of 78325153 in words is "seventy-eight million, three hundred twenty-five thousand, one hundred fifty-three".