139474761 has 8 divisors (see below), whose sum is σ = 189118560. Its totient is φ = 91407072.

The previous prime is 139474759. The next prime is 139474789. The reversal of 139474761 is 167474931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 139474761 - 2¹ = 139474759 is a prime.

It is not an unprimeable number, because it can be changed into a prime (139474721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 393820 + ... + 394173.

It is an arithmetic number, because the mean of its divisors is an integer number (23639820).

Almost surely, 2^139474761 is an apocalyptic number.

It is an amenable number.

139474761 is a deficient number, since it is larger than the sum of its proper divisors (49643799).

139474761 is an equidigital number, since it uses as much as digits as its factorization.

139474761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788055.

The product of its digits is 127008, while the sum is 42.

The square root of 139474761 is about 11809.9433106175. The cubic root of 139474761 is about 518.5992391819.

The spelling of 139474761 in words is "one hundred thirty-nine million, four hundred seventy-four thousand, seven hundred sixty-one".