64238749 has 2 divisors, whose sum is σ = 64238750. Its totient is φ = 64238748.

The previous prime is 64238737. The next prime is 64238761. The reversal of 64238749 is 94783246.

It is a balanced prime because it is at equal distance from previous prime (64238737) and next prime (64238761).

It can be written as a sum of positive squares in only one way, i.e., 48580900 + 15657849 = 6970^2 + 3957^2 .

It is a cyclic number.

It is not a de Polignac number, because 64238749 - 2⁵ = 64238717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64238249) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32119374 + 32119375.

It is an arithmetic number, because the mean of its divisors is an integer number (32119375).

Almost surely, 2^64238749 is an apocalyptic number.

It is an amenable number.

64238749 is a deficient number, since it is larger than the sum of its proper divisors (1).

64238749 is an equidigital number, since it uses as much as digits as its factorization.

64238749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 290304, while the sum is 43.

The square root of 64238749 is about 8014.9079221161. The cubic root of 64238749 is about 400.4967765273.

The spelling of 64238749 in words is "sixty-four million, two hundred thirty-eight thousand, seven hundred forty-nine".