139547899 has 2 divisors, whose sum is σ = 139547900. Its totient is φ = 139547898.

The previous prime is 139547893. The next prime is 139547909. The reversal of 139547899 is 998745931.

139547899 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 139547899 - 2¹³ = 139539707 is a prime.

It is a super-2 number, since 2×139547899² = 38947232230628402, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (139547893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69773949 + 69773950.

It is an arithmetic number, because the mean of its divisors is an integer number (69773950).

Almost surely, 2^139547899 is an apocalyptic number.

139547899 is a deficient number, since it is larger than the sum of its proper divisors (1).

139547899 is an equidigital number, since it uses as much as digits as its factorization.

139547899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2449440, while the sum is 55.

The square root of 139547899 is about 11813.0393633476. The cubic root of 139547899 is about 518.6898713101.

It can be divided in two parts, 1395 and 47899, that added together give a palindrome (49294).

The spelling of 139547899 in words is "one hundred thirty-nine million, five hundred forty-seven thousand, eight hundred ninety-nine".