139538415 has 16 divisors (see below), whose sum is σ = 226922976. Its totient is φ = 73200000.

The previous prime is 139538393. The next prime is 139538417. The reversal of 139538415 is 514835931.

It is not a de Polignac number, because 139538415 - 2¹¹ = 139536367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139538417) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75336 + ... + 77165.

It is an arithmetic number, because the mean of its divisors is an integer number (14182686).

Almost surely, 2^139538415 is an apocalyptic number.

139538415 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

139538415 is a deficient number, since it is larger than the sum of its proper divisors (87384561).

139538415 is a wasteful number, since it uses less digits than its factorization.

139538415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152570.

The product of its digits is 64800, while the sum is 39.

The square root of 139538415 is about 11812.6379357026. The cubic root of 139538415 is about 518.6781205869.

The spelling of 139538415 in words is "one hundred thirty-nine million, five hundred thirty-eight thousand, four hundred fifteen".