52120137947 has 2 divisors, whose sum is σ = 52120137948. Its totient is φ = 52120137946.

The previous prime is 52120137943. The next prime is 52120137991. The reversal of 52120137947 is 74973102125.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 52120137947 - 2² = 52120137943 is a prime.

It is a super-2 number, since 2×52120137947² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (52120137943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26060068973 + 26060068974.

It is an arithmetic number, because the mean of its divisors is an integer number (26060068974).

Almost surely, 2^52120137947 is an apocalyptic number.

52120137947 is a deficient number, since it is larger than the sum of its proper divisors (1).

52120137947 is an equidigital number, since it uses as much as digits as its factorization.

52120137947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 41.

The spelling of 52120137947 in words is "fifty-two billion, one hundred twenty million, one hundred thirty-seven thousand, nine hundred forty-seven".