139373805 has 16 divisors (see below), whose sum is σ = 223709184. Its totient is φ = 74095680.

The previous prime is 139373789. The next prime is 139373809. The reversal of 139373805 is 508373931.

It is not a de Polignac number, because 139373805 - 2⁴ = 139373789 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139373809) 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, 9901 + ... + 19410.

It is an arithmetic number, because the mean of its divisors is an integer number (13981824).

Almost surely, 2^139373805 is an apocalyptic number.

139373805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

139373805 is a deficient number, since it is larger than the sum of its proper divisors (84335379).

139373805 is a wasteful number, since it uses less digits than its factorization.

139373805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29636.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 139373805 is about 11805.6683419449. The cubic root of 139373805 is about 518.4740831041.

The spelling of 139373805 in words is "one hundred thirty-nine million, three hundred seventy-three thousand, eight hundred five".