139848457 has 4 divisors (see below), whose sum is σ = 159826816. Its totient is φ = 119870100.

The previous prime is 139848451. The next prime is 139848473. The reversal of 139848457 is 754848931.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 139848457 - 2¹¹ = 139846409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139848457.

It is not an unprimeable number, because it can be changed into a prime (139848451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9989169 + ... + 9989182.

It is an arithmetic number, because the mean of its divisors is an integer number (39956704).

Almost surely, 2^139848457 is an apocalyptic number.

It is an amenable number.

139848457 is a deficient number, since it is larger than the sum of its proper divisors (19978359).

139848457 is an equidigital number, since it uses as much as digits as its factorization.

139848457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19978358.

The product of its digits is 967680, while the sum is 49.

The square root of 139848457 is about 11825.7539717347. The cubic root of 139848457 is about 519.0619887027.

The spelling of 139848457 in words is "one hundred thirty-nine million, eight hundred forty-eight thousand, four hundred fifty-seven".