1961099 has 8 divisors (see below), whose sum is σ = 2251488. Its totient is φ = 1673280.

The previous prime is 1961093. The next prime is 1961107. The reversal of 1961099 is 9901691.

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

It is not a de Polignac number, because 1961099 - 2⁴ = 1961083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961093) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1469 + ... + 2465.

It is an arithmetic number, because the mean of its divisors is an integer number (281436).

2^1961099 is an apocalyptic number.

1961099 is a deficient number, since it is larger than the sum of its proper divisors (290389).

1961099 is an equidigital number, since it uses as much as digits as its factorization.

1961099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285.

The product of its (nonzero) digits is 4374, while the sum is 35.

The square root of 1961099 is about 1400.3924449953. The cubic root of 1961099 is about 125.1698810189.

The spelling of 1961099 in words is "one million, nine hundred sixty-one thousand, ninety-nine".