961720043 has 2 divisors, whose sum is σ = 961720044. Its totient is φ = 961720042.

The previous prime is 961720007. The next prime is 961720103. The reversal of 961720043 is 340027169.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 961720043 - 2¹² = 961715947 is a prime.

It is a super-2 number, since 2×961720043² = 1849810882215843698, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 961719991 and 961720009.

It is not a weakly prime, because it can be changed into another prime (961720003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 480860021 + 480860022.

It is an arithmetic number, because the mean of its divisors is an integer number (480860022).

Almost surely, 2^961720043 is an apocalyptic number.

961720043 is a deficient number, since it is larger than the sum of its proper divisors (1).

961720043 is an equidigital number, since it uses as much as digits as its factorization.

961720043 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 961720043 is about 31011.6114221754. The cubic root of 961720043 is about 987.0736436015.

The spelling of 961720043 in words is "nine hundred sixty-one million, seven hundred twenty thousand, forty-three".