1961305417 has 4 divisors (see below), whose sum is σ = 1962032656. Its totient is φ = 1960578180.

The previous prime is 1961305403. The next prime is 1961305433. The reversal of 1961305417 is 7145031691.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1961305417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961305447) 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, 359559 + ... + 364972.

It is an arithmetic number, because the mean of its divisors is an integer number (490508164).

Almost surely, 2^1961305417 is an apocalyptic number.

It is an amenable number.

1961305417 is a deficient number, since it is larger than the sum of its proper divisors (727239).

1961305417 is an equidigital number, since it uses as much as digits as its factorization.

1961305417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727238.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 1961305417 is about 44286.6279705285. The cubic root of 1961305417 is about 1251.7427248257.

The spelling of 1961305417 in words is "one billion, nine hundred sixty-one million, three hundred five thousand, four hundred seventeen".