82961861 has 4 divisors (see below), whose sum is σ = 83615232. Its totient is φ = 82308492.

The previous prime is 82961833. The next prime is 82961873. The reversal of 82961861 is 16816928.

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 a de Polignac number, because none of the positive numbers 2^k-82961861 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 (82961761) 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, 326495 + ... + 326748.

It is an arithmetic number, because the mean of its divisors is an integer number (20903808).

Almost surely, 2^82961861 is an apocalyptic number.

It is an amenable number.

82961861 is a deficient number, since it is larger than the sum of its proper divisors (653371).

82961861 is a wasteful number, since it uses less digits than its factorization.

82961861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653370.

The product of its digits is 41472, while the sum is 41.

The square root of 82961861 is about 9108.3401890795. The cubic root of 82961861 is about 436.1402436508.

The spelling of 82961861 in words is "eighty-two million, nine hundred sixty-one thousand, eight hundred sixty-one".