139802101 has 4 divisors (see below), whose sum is σ = 148025772. Its totient is φ = 131578432.

The previous prime is 139802099. The next prime is 139802107. The reversal of 139802101 is 101208931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 101208931 = 89 ⋅1137179.

It can be written as a sum of positive squares in 2 ways, for example, as 120670225 + 19131876 = 10985^2 + 4374^2 .

It is a cyclic number.

It is not a de Polignac number, because 139802101 - 2¹ = 139802099 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 (139802107) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4111810 + ... + 4111843.

It is an arithmetic number, because the mean of its divisors is an integer number (37006443).

Almost surely, 2^139802101 is an apocalyptic number.

It is an amenable number.

139802101 is a deficient number, since it is larger than the sum of its proper divisors (8223671).

139802101 is an equidigital number, since it uses as much as digits as its factorization.

139802101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8223670.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 139802101 is about 11823.7938496914. The cubic root of 139802101 is about 519.0046306711.

The spelling of 139802101 in words is "one hundred thirty-nine million, eight hundred two thousand, one hundred one".