139309951 has 16 divisors (see below), whose sum is σ = 163330560. Its totient is φ = 117406080.

The previous prime is 139309949. The next prime is 139309967. The reversal of 139309951 is 159903931.

It is not a de Polignac number, because 139309951 - 2¹ = 139309949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139309901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6970 + ... + 18088.

It is an arithmetic number, because the mean of its divisors is an integer number (10208160).

Almost surely, 2^139309951 is an apocalyptic number.

139309951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

139309951 is a deficient number, since it is larger than the sum of its proper divisors (24020609).

139309951 is a wasteful number, since it uses less digits than its factorization.

139309951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11214.

The product of its (nonzero) digits is 32805, while the sum is 40.

The square root of 139309951 is about 11802.9636532525. The cubic root of 139309951 is about 518.3948915102.

The spelling of 139309951 in words is "one hundred thirty-nine million, three hundred nine thousand, nine hundred fifty-one".