52278739 has 2 divisors, whose sum is σ = 52278740. Its totient is φ = 52278738.

The previous prime is 52278713. The next prime is 52278749. The reversal of 52278739 is 93787225.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 52278739 - 2⁹ = 52278227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 52278695 and 52278704.

It is not a weakly prime, because it can be changed into another prime (52278749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26139369 + 26139370.

It is an arithmetic number, because the mean of its divisors is an integer number (26139370).

Almost surely, 2^52278739 is an apocalyptic number.

52278739 is a deficient number, since it is larger than the sum of its proper divisors (1).

52278739 is an equidigital number, since it uses as much as digits as its factorization.

52278739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 43.

The square root of 52278739 is about 7230.4037923203. The cubic root of 52278739 is about 373.9168483582.

The spelling of 52278739 in words is "fifty-two million, two hundred seventy-eight thousand, seven hundred thirty-nine".