670423049 has 2 divisors, whose sum is σ = 670423050. Its totient is φ = 670423048.

The previous prime is 670423009. The next prime is 670423097. The reversal of 670423049 is 940324076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 583560649 + 86862400 = 24157^2 + 9320^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-670423049 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (670423009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335211524 + 335211525.

It is an arithmetic number, because the mean of its divisors is an integer number (335211525).

Almost surely, 2^670423049 is an apocalyptic number.

It is an amenable number.

670423049 is a deficient number, since it is larger than the sum of its proper divisors (1).

670423049 is an equidigital number, since it uses as much as digits as its factorization.

670423049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 35.

The square root of 670423049 is about 25892.5288258988. The cubic root of 670423049 is about 875.2181438147.

The spelling of 670423049 in words is "six hundred seventy million, four hundred twenty-three thousand, forty-nine".