78352387 has 2 divisors, whose sum is σ = 78352388. Its totient is φ = 78352386.

The previous prime is 78352369. The next prime is 78352397. The reversal of 78352387 is 78325387.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78352387 - 2¹¹ = 78350339 is a prime.

It is a super-2 number, since 2×78352387² = 12278193097195538, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78352327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39176193 + 39176194.

It is an arithmetic number, because the mean of its divisors is an integer number (39176194).

Almost surely, 2^78352387 is an apocalyptic number.

78352387 is a deficient number, since it is larger than the sum of its proper divisors (1).

78352387 is an equidigital number, since it uses as much as digits as its factorization.

78352387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 282240, while the sum is 43.

The square root of 78352387 is about 8851.6883700230. The cubic root of 78352387 is about 427.9083329904.

Subtracting from 78352387 its reverse (78325387), we obtain a cube (27000 = 30³).

The spelling of 78352387 in words is "seventy-eight million, three hundred fifty-two thousand, three hundred eighty-seven".