1672969391 has 2 divisors, whose sum is σ = 1672969392. Its totient is φ = 1672969390.

The previous prime is 1672969357. The next prime is 1672969409. The reversal of 1672969391 is 1939692761.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (1939692761) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1672969391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1672966391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 836484695 + 836484696.

It is an arithmetic number, because the mean of its divisors is an integer number (836484696).

Almost surely, 2^1672969391 is an apocalyptic number.

1672969391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1672969391 is an equidigital number, since it uses as much as digits as its factorization.

1672969391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1102248, while the sum is 53.

The square root of 1672969391 is about 40901.9484988185. The cubic root of 1672969391 is about 1187.1237627072.

The spelling of 1672969391 in words is "one billion, six hundred seventy-two million, nine hundred sixty-nine thousand, three hundred ninety-one".