139045397 has 8 divisors (see below), whose sum is σ = 147434112. Its totient is φ = 130680000.

The previous prime is 139045349. The next prime is 139045409. The reversal of 139045397 is 793540931.

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

It is a cyclic number.

It is not a de Polignac number, because 139045397 - 2²⁶ = 71936533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139045307) 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, 7322 + ... + 18212.

It is an arithmetic number, because the mean of its divisors is an integer number (18429264).

Almost surely, 2^139045397 is an apocalyptic number.

139045397 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

139045397 is a deficient number, since it is larger than the sum of its proper divisors (8388715).

139045397 is a wasteful number, since it uses less digits than its factorization.

139045397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11659.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 139045397 is about 11791.7512270231. The cubic root of 139045397 is about 518.0665341409.

The spelling of 139045397 in words is "one hundred thirty-nine million, forty-five thousand, three hundred ninety-seven".