78252337 has 2 divisors, whose sum is σ = 78252338. Its totient is φ = 78252336.

The previous prime is 78252331. The next prime is 78252341. The reversal of 78252337 is 73325287.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73547776 + 4704561 = 8576^2 + 2169^2 .

It is a cyclic number.

It is not a de Polignac number, because 78252337 - 2³ = 78252329 is a prime.

It is a super-2 number, since 2×78252337² = 12246856491923138, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78252296 and 78252305.

It is not a weakly prime, because it can be changed into another prime (78252331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39126168 + 39126169.

It is an arithmetic number, because the mean of its divisors is an integer number (39126169).

Almost surely, 2^78252337 is an apocalyptic number.

It is an amenable number.

78252337 is a deficient number, since it is larger than the sum of its proper divisors (1).

78252337 is an equidigital number, since it uses as much as digits as its factorization.

78252337 is an evil number, because the sum of its binary digits is even.

The product of its digits is 70560, while the sum is 37.

The square root of 78252337 is about 8846.0351005408. The cubic root of 78252337 is about 427.7261200166.

The spelling of 78252337 in words is "seventy-eight million, two hundred fifty-two thousand, three hundred thirty-seven".