105139901 has 4 divisors (see below), whose sum is σ = 110673600. Its totient is φ = 99606204.

The previous prime is 105139897. The next prime is 105139907. The reversal of 105139901 is 109931501.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 109931501 = 71 ⋅1548331.

It is a cyclic number.

It is not a de Polignac number, because 105139901 - 2² = 105139897 is a prime.

It is a super-2 number, since 2×105139901² = 22108797564579602, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105139907) 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, 2766821 + ... + 2766858.

It is an arithmetic number, because the mean of its divisors is an integer number (27668400).

Almost surely, 2^105139901 is an apocalyptic number.

It is an amenable number.

105139901 is a deficient number, since it is larger than the sum of its proper divisors (5533699).

105139901 is an equidigital number, since it uses as much as digits as its factorization.

105139901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5533698.

The product of its (nonzero) digits is 1215, while the sum is 29.

The square root of 105139901 is about 10253.7749633976. The cubic root of 105139901 is about 471.9788320608.

The spelling of 105139901 in words is "one hundred five million, one hundred thirty-nine thousand, nine hundred one".