1946972761 has 2 divisors, whose sum is σ = 1946972762. Its totient is φ = 1946972760.

The previous prime is 1946972737. The next prime is 1946972767. The reversal of 1946972761 is 1672796491.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1902617161 + 44355600 = 43619^2 + 6660^2 .

It is an emirp because it is prime and its reverse (1672796491) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1946972761 - 2⁹ = 1946972249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1946972699 and 1946972708.

It is not a weakly prime, because it can be changed into another prime (1946972767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 973486380 + 973486381.

It is an arithmetic number, because the mean of its divisors is an integer number (973486381).

Almost surely, 2^1946972761 is an apocalyptic number.

It is an amenable number.

1946972761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1946972761 is an equidigital number, since it uses as much as digits as its factorization.

1946972761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 52.

The square root of 1946972761 is about 44124.5142862786. The cubic root of 1946972761 is about 1248.6861418519.

The spelling of 1946972761 in words is "one billion, nine hundred forty-six million, nine hundred seventy-two thousand, seven hundred sixty-one".