139691037 has 8 divisors (see below), whose sum is σ = 189308320. Its totient is φ = 91600560.

The previous prime is 139691017. The next prime is 139691081. The reversal of 139691037 is 730196931.

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

It is not a de Polignac number, because 139691037 - 2¹⁶ = 139625501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139690986 and 139691004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139691017) 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, 381487 + ... + 381852.

It is an arithmetic number, because the mean of its divisors is an integer number (23663540).

Almost surely, 2^139691037 is an apocalyptic number.

It is an amenable number.

139691037 is a deficient number, since it is larger than the sum of its proper divisors (49617283).

139691037 is an equidigital number, since it uses as much as digits as its factorization.

139691037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 763403.

The product of its (nonzero) digits is 30618, while the sum is 39.

The square root of 139691037 is about 11819.0962852496. The cubic root of 139691037 is about 518.8671553849.

The spelling of 139691037 in words is "one hundred thirty-nine million, six hundred ninety-one thousand, thirty-seven".