8961655 has 4 divisors (see below), whose sum is σ = 10753992. Its totient is φ = 7169320.

The previous prime is 8961619. The next prime is 8961661. The reversal of 8961655 is 5561698.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 8961655 - 2⁷ = 8961527 is a prime.

It is a super-2 number, since 2×8961655² = 160622520678050, which contains 22 as substring.

It is a Duffinian number.

8961655 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 896161 + ... + 896170.

It is an arithmetic number, because the mean of its divisors is an integer number (2688498).

Almost surely, 2^8961655 is an apocalyptic number.

8961655 is a deficient number, since it is larger than the sum of its proper divisors (1792337).

8961655 is a wasteful number, since it uses less digits than its factorization.

8961655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792336.

The product of its digits is 64800, while the sum is 40.

The square root of 8961655 is about 2993.6023450018. The cubic root of 8961655 is about 207.7125513489.

The spelling of 8961655 in words is "eight million, nine hundred sixty-one thousand, six hundred fifty-five".