49142539 has 2 divisors, whose sum is σ = 49142540. Its totient is φ = 49142538.

The previous prime is 49142491. The next prime is 49142567. The reversal of 49142539 is 93524194.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 49142539 - 2¹³ = 49134347 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 49142498 and 49142507.

It is not a weakly prime, because it can be changed into another prime (49142039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24571269 + 24571270.

It is an arithmetic number, because the mean of its divisors is an integer number (24571270).

Almost surely, 2^49142539 is an apocalyptic number.

49142539 is a deficient number, since it is larger than the sum of its proper divisors (1).

49142539 is an equidigital number, since it uses as much as digits as its factorization.

49142539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 37.

The square root of 49142539 is about 7010.1739636046. The cubic root of 49142539 is about 366.2850531978.

The spelling of 49142539 in words is "forty-nine million, one hundred forty-two thousand, five hundred thirty-nine".