649179373 has 2 divisors, whose sum is σ = 649179374. Its totient is φ = 649179372.

The previous prime is 649179371. The next prime is 649179449. The reversal of 649179373 is 373971946.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 356529924 + 292649449 = 18882^2 + 17107^2 .

It is a cyclic number.

It is not a de Polignac number, because 649179373 - 2¹ = 649179371 is a prime.

Together with 649179371, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649179371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324589686 + 324589687.

It is an arithmetic number, because the mean of its divisors is an integer number (324589687).

Almost surely, 2^649179373 is an apocalyptic number.

It is an amenable number.

649179373 is a deficient number, since it is larger than the sum of its proper divisors (1).

649179373 is an equidigital number, since it uses as much as digits as its factorization.

649179373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 49.

The square root of 649179373 is about 25478.9986655677. The cubic root of 649179373 is about 865.8744086423.

The spelling of 649179373 in words is "six hundred forty-nine million, one hundred seventy-nine thousand, three hundred seventy-three".