1961693493 has 8 divisors (see below), whose sum is σ = 2616094656. Its totient is φ = 1307544000.

The previous prime is 1961693453. The next prime is 1961693509. The reversal of 1961693493 is 3943961691.

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

It is not a de Polignac number, because 1961693493 - 2¹² = 1961689397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961693453) 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, 43908 + ... + 76493.

It is an arithmetic number, because the mean of its divisors is an integer number (327011832).

Almost surely, 2^1961693493 is an apocalyptic number.

It is an amenable number.

1961693493 is a deficient number, since it is larger than the sum of its proper divisors (654401163).

1961693493 is a wasteful number, since it uses less digits than its factorization.

1961693493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125835.

The product of its digits is 944784, while the sum is 51.

The square root of 1961693493 is about 44291.0091666469. The cubic root of 1961693493 is about 1251.8252785626.

The spelling of 1961693493 in words is "one billion, nine hundred sixty-one million, six hundred ninety-three thousand, four hundred ninety-three".