105280397 has 4 divisors (see below), whose sum is σ = 105301020. Its totient is φ = 105259776.

The previous prime is 105280391. The next prime is 105280447. The reversal of 105280397 is 793082501.

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 20529961 + 84750436 = 4531^2 + 9206^2 .

It is a cyclic number.

It is not a de Polignac number, because 105280397 - 2¹⁰ = 105279373 is a prime.

It is a super-2 number, since 2×105280397² = 22167923984955218, 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 (105280391) 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, 3629 + ... + 14957.

It is an arithmetic number, because the mean of its divisors is an integer number (26325255).

Almost surely, 2^105280397 is an apocalyptic number.

It is an amenable number.

105280397 is a deficient number, since it is larger than the sum of its proper divisors (20623).

105280397 is an equidigital number, since it uses as much as digits as its factorization.

105280397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20622.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 105280397 is about 10260.6236165255. The cubic root of 105280397 is about 472.1889699266.

The spelling of 105280397 in words is "one hundred five million, two hundred eighty thousand, three hundred ninety-seven".