139534557 has 4 divisors (see below), whose sum is σ = 186046080. Its totient is φ = 93023036.

The previous prime is 139534553. The next prime is 139534559. The reversal of 139534557 is 755435931.

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 a cyclic number.

It is not a de Polignac number, because 139534557 - 2² = 139534553 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139534553) 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 3 ways as a sum of consecutive naturals, for example, 23255757 + ... + 23255762.

It is an arithmetic number, because the mean of its divisors is an integer number (46511520).

Almost surely, 2^139534557 is an apocalyptic number.

It is an amenable number.

139534557 is a deficient number, since it is larger than the sum of its proper divisors (46511523).

139534557 is an equidigital number, since it uses as much as digits as its factorization.

139534557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46511522.

The product of its digits is 283500, while the sum is 42.

The square root of 139534557 is about 11812.4746348934. The cubic root of 139534557 is about 518.6733403534.

The spelling of 139534557 in words is "one hundred thirty-nine million, five hundred thirty-four thousand, five hundred fifty-seven".