1672969409 has 2 divisors, whose sum is σ = 1672969410. Its totient is φ = 1672969408.

The previous prime is 1672969391. The next prime is 1672969421. The reversal of 1672969409 is 9049692761.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1364194225 + 308775184 = 36935^2 + 17572^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1672969409 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1672969709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836484704 + 836484705.

It is an arithmetic number, because the mean of its divisors is an integer number (836484705).

Almost surely, 2^1672969409 is an apocalyptic number.

It is an amenable number.

1672969409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1672969409 is an equidigital number, since it uses as much as digits as its factorization.

1672969409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1469664, while the sum is 53.

The square root of 1672969409 is about 40901.9487188569. The cubic root of 1672969409 is about 1187.1237669648.

The spelling of 1672969409 in words is "one billion, six hundred seventy-two million, nine hundred sixty-nine thousand, four hundred nine".