861373061 has 8 divisors (see below), whose sum is σ = 894596760. Its totient is φ = 828672768.

The previous prime is 861373001. The next prime is 861373081. The reversal of 861373061 is 160373168.

It can be written as a sum of positive squares in 4 ways, for example, as 154132225 + 707240836 = 12415^2 + 26594^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 861373061 - 2¹⁴ = 861356677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861373001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 127496 + ... + 134081.

It is an arithmetic number, because the mean of its divisors is an integer number (111824595).

Almost surely, 2^861373061 is an apocalyptic number.

It is an amenable number.

861373061 is a deficient number, since it is larger than the sum of its proper divisors (33223699).

861373061 is a wasteful number, since it uses less digits than its factorization.

861373061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261703.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 861373061 is about 29349.1577562287. The cubic root of 861373061 is about 951.4743721298.

It can be divided in two parts, 86137 and 3061, that added together give a palindrome (89198).

The spelling of 861373061 in words is "eight hundred sixty-one million, three hundred seventy-three thousand, sixty-one".