672989441 has 2 divisors, whose sum is σ = 672989442. Its totient is φ = 672989440.

The previous prime is 672989423. The next prime is 672989479. The reversal of 672989441 is 144989276.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 620209216 + 52780225 = 24904^2 + 7265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-672989441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 672989441.

It is not a weakly prime, because it can be changed into another prime (672985441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336494720 + 336494721.

It is an arithmetic number, because the mean of its divisors is an integer number (336494721).

Almost surely, 2^672989441 is an apocalyptic number.

It is an amenable number.

672989441 is a deficient number, since it is larger than the sum of its proper divisors (1).

672989441 is an equidigital number, since it uses as much as digits as its factorization.

672989441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 870912, while the sum is 50.

The square root of 672989441 is about 25942.0400315781. The cubic root of 672989441 is about 876.3335056352. Note that the first 3 decimals are identical.

The spelling of 672989441 in words is "six hundred seventy-two million, nine hundred eighty-nine thousand, four hundred forty-one".