1961926493 has 8 divisors (see below), whose sum is σ = 2000253528. Its totient is φ = 1923648064.

The previous prime is 1961926489. The next prime is 1961926501. The reversal of 1961926493 is 3946291691.

It can be written as a sum of positive squares in 4 ways, for example, as 55905529 + 1906020964 = 7477^2 + 43658^2 .

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 1961926493 - 2² = 1961926489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961926403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75455 + ... + 98067.

It is an arithmetic number, because the mean of its divisors is an integer number (250031691).

Almost surely, 2^1961926493 is an apocalyptic number.

It is an amenable number.

1961926493 is a deficient number, since it is larger than the sum of its proper divisors (38327035).

1961926493 is a wasteful number, since it uses less digits than its factorization.

1961926493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24303.

The product of its digits is 629856, while the sum is 50.

The square root of 1961926493 is about 44293.6394192214. The cubic root of 1961926493 is about 1251.8748384188.

The spelling of 1961926493 in words is "one billion, nine hundred sixty-one million, nine hundred twenty-six thousand, four hundred ninety-three".