139630637 has 8 divisors (see below), whose sum is σ = 143947800. Its totient is φ = 135342144.

The previous prime is 139630633. The next prime is 139630649. The reversal of 139630637 is 736036931.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 249001 + 139381636 = 499^2 + 11806^2 .

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 139630637 - 2² = 139630633 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139630637.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139630633) 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, 2939 + ... + 16967.

It is an arithmetic number, because the mean of its divisors is an integer number (17993475).

Almost surely, 2^139630637 is an apocalyptic number.

It is an amenable number.

139630637 is a deficient number, since it is larger than the sum of its proper divisors (4317163).

139630637 is a wasteful number, since it uses less digits than its factorization.

139630637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14335.

The product of its (nonzero) digits is 61236, while the sum is 38.

The square root of 139630637 is about 11816.5408220849. The cubic root of 139630637 is about 518.7923615283.

The spelling of 139630637 in words is "one hundred thirty-nine million, six hundred thirty thousand, six hundred thirty-seven".