1961413 has 2 divisors, whose sum is σ = 1961414. Its totient is φ = 1961412.

The previous prime is 1961411. The next prime is 1961419. The reversal of 1961413 is 3141691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1127844 + 833569 = 1062^2 + 913^2 .

It is a cyclic number.

It is not a de Polignac number, because 1961413 - 2¹ = 1961411 is a prime.

Together with 1961411, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1961411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 980706 + 980707.

It is an arithmetic number, because the mean of its divisors is an integer number (980707).

2^1961413 is an apocalyptic number.

It is an amenable number.

1961413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1961413 is an equidigital number, since it uses as much as digits as its factorization.

1961413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 648, while the sum is 25.

The square root of 1961413 is about 1400.5045519383. The cubic root of 1961413 is about 125.1765611585.

The spelling of 1961413 in words is "one million, nine hundred sixty-one thousand, four hundred thirteen".