139803401 has 4 divisors (see below), whose sum is σ = 140301204. Its totient is φ = 139305600.

The previous prime is 139803373. The next prime is 139803413. The reversal of 139803401 is 104308931.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 74839801 + 64963600 = 8651^2 + 8060^2 .

It is a cyclic number.

It is not a de Polignac number, because 139803401 - 2¹⁴ = 139787017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139803491) 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, 248480 + ... + 249041.

It is an arithmetic number, because the mean of its divisors is an integer number (35075301).

Almost surely, 2^139803401 is an apocalyptic number.

It is an amenable number.

139803401 is a deficient number, since it is larger than the sum of its proper divisors (497803).

139803401 is an equidigital number, since it uses as much as digits as its factorization.

139803401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497802.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 139803401 is about 11823.8488234585. The cubic root of 139803401 is about 519.0062393831.

The spelling of 139803401 in words is "one hundred thirty-nine million, eight hundred three thousand, four hundred one".