1961913 has 8 divisors (see below), whose sum is σ = 2625408. Its totient is φ = 1303184.

The previous prime is 1961909. The next prime is 1961917. The reversal of 1961913 is 3191691.

It is an interprime number because it is at equal distance from previous prime (1961909) and next prime (1961917).

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

It is a cyclic number.

It is not a de Polignac number, because 1961913 - 2² = 1961909 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1961917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81 + ... + 1982.

It is an arithmetic number, because the mean of its divisors is an integer number (328176).

2^1961913 is an apocalyptic number.

It is an amenable number.

1961913 is a deficient number, since it is larger than the sum of its proper divisors (663495).

1961913 is a wasteful number, since it uses less digits than its factorization.

1961913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2383.

The product of its digits is 1458, while the sum is 30.

The square root of 1961913 is about 1400.6830476592. The cubic root of 1961913 is about 125.1871968521.

The spelling of 1961913 in words is "one million, nine hundred sixty-one thousand, nine hundred thirteen".