1961629 has 4 divisors (see below), whose sum is σ = 2014684. Its totient is φ = 1908576.

The previous prime is 1961623. The next prime is 1961633. The reversal of 1961629 is 9261691.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1822500 + 139129 = 1350^2 + 373^2 .

It is a cyclic number.

It is not a de Polignac number, because 1961629 - 2⁷ = 1961501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1961594 and 1961603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961623) 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, 26472 + ... + 26545.

It is an arithmetic number, because the mean of its divisors is an integer number (503671).

2^1961629 is an apocalyptic number.

It is an amenable number.

1961629 is a deficient number, since it is larger than the sum of its proper divisors (53055).

1961629 is an equidigital number, since it uses as much as digits as its factorization.

1961629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53054.

The product of its digits is 5832, while the sum is 34.

The square root of 1961629 is about 1400.5816648807. The cubic root of 1961629 is about 125.1811559999.

The spelling of 1961629 in words is "one million, nine hundred sixty-one thousand, six hundred twenty-nine".