16961905 has 16 divisors (see below), whose sum is σ = 21090384. Its totient is φ = 13086720.

The previous prime is 16961891. The next prime is 16961941. The reversal of 16961905 is 50916961.

It can be written as a sum of positive squares in 8 ways, for example, as 6210064 + 10751841 = 2492^2 + 3279^2 .

It is not a de Polignac number, because 16961905 - 2¹¹ = 16959857 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19459 + ... + 20311.

It is an arithmetic number, because the mean of its divisors is an integer number (1318149).

Almost surely, 2^16961905 is an apocalyptic number.

It is an amenable number.

16961905 is a deficient number, since it is larger than the sum of its proper divisors (4128479).

16961905 is an equidigital number, since it uses as much as digits as its factorization.

16961905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996.

The product of its (nonzero) digits is 14580, while the sum is 37.

The square root of 16961905 is about 4118.4833373464. The cubic root of 16961905 is about 256.9359507708.

The spelling of 16961905 in words is "sixteen million, nine hundred sixty-one thousand, nine hundred five".