106839561 has 4 divisors (see below), whose sum is σ = 142452752. Its totient is φ = 71226372.

The previous prime is 106839559. The next prime is 106839569. The reversal of 106839561 is 165938601.

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.

It is not a de Polignac number, because 106839561 - 2¹ = 106839559 is a prime.

It is a super-2 number, since 2×106839561² = 22829383589345442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (106839569) 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, 17806591 + ... + 17806596.

It is an arithmetic number, because the mean of its divisors is an integer number (35613188).

Almost surely, 2^106839561 is an apocalyptic number.

It is an amenable number.

106839561 is a deficient number, since it is larger than the sum of its proper divisors (35613191).

106839561 is an equidigital number, since it uses as much as digits as its factorization.

106839561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35613190.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 106839561 is about 10336.3224117672. The cubic root of 106839561 is about 474.5085384038.

The spelling of 106839561 in words is "one hundred six million, eight hundred thirty-nine thousand, five hundred sixty-one".