438761957 has 2 divisors, whose sum is σ = 438761958. Its totient is φ = 438761956.

The previous prime is 438761929. The next prime is 438761963. The reversal of 438761957 is 759167834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 437395396 + 1366561 = 20914^2 + 1169^2 .

It is a cyclic number.

It is not a de Polignac number, because 438761957 - 2¹⁶ = 438696421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (438731957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 219380978 + 219380979.

It is an arithmetic number, because the mean of its divisors is an integer number (219380979).

Almost surely, 2^438761957 is an apocalyptic number.

It is an amenable number.

438761957 is a deficient number, since it is larger than the sum of its proper divisors (1).

438761957 is an equidigital number, since it uses as much as digits as its factorization.

438761957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1270080, while the sum is 50.

The square root of 438761957 is about 20946.6454832271. The cubic root of 438761957 is about 759.8764555642.

The spelling of 438761957 in words is "four hundred thirty-eight million, seven hundred sixty-one thousand, nine hundred fifty-seven".