861667141 has 4 divisors (see below), whose sum is σ = 872574400. Its totient is φ = 850759884.

The previous prime is 861667139. The next prime is 861667159. The reversal of 861667141 is 141766168.

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 a cyclic number.

It is not a de Polignac number, because 861667141 - 2¹ = 861667139 is a prime.

It is a super-2 number, since 2×861667141² = 1484940523758227762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 861667094 and 861667103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861667171) 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, 5453511 + ... + 5453668.

It is an arithmetic number, because the mean of its divisors is an integer number (218143600).

Almost surely, 2^861667141 is an apocalyptic number.

It is an amenable number.

861667141 is a deficient number, since it is larger than the sum of its proper divisors (10907259).

861667141 is a wasteful number, since it uses less digits than its factorization.

861667141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10907258.

The product of its digits is 48384, while the sum is 40.

The square root of 861667141 is about 29354.1673532056. The cubic root of 861667141 is about 951.5826402577.

It can be divided in two parts, 8616 and 67141, that added together give a palindrome (75757).

The spelling of 861667141 in words is "eight hundred sixty-one million, six hundred sixty-seven thousand, one hundred forty-one".