672749461 has 2 divisors, whose sum is σ = 672749462. Its totient is φ = 672749460.

The previous prime is 672749431. The next prime is 672749477. The reversal of 672749461 is 164947276.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 654848100 + 17901361 = 25590^2 + 4231^2 .

It is a cyclic number.

It is not a de Polignac number, because 672749461 - 2²¹ = 670652309 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (672749431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 336374730 + 336374731.

It is an arithmetic number, because the mean of its divisors is an integer number (336374731).

Almost surely, 2^672749461 is an apocalyptic number.

It is an amenable number.

672749461 is a deficient number, since it is larger than the sum of its proper divisors (1).

672749461 is an equidigital number, since it uses as much as digits as its factorization.

672749461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 46.

The square root of 672749461 is about 25937.4143082922. The cubic root of 672749461 is about 876.2293298964.

The spelling of 672749461 in words is "six hundred seventy-two million, seven hundred forty-nine thousand, four hundred sixty-one".