64238737 has 2 divisors, whose sum is σ = 64238738. Its totient is φ = 64238736.

The previous prime is 64238717. The next prime is 64238749. The reversal of 64238737 is 73783246.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56791296 + 7447441 = 7536^2 + 2729^2 .

It is a cyclic number.

It is not a de Polignac number, because 64238737 - 2¹⁹ = 63714449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64238737.

It is not a weakly prime, because it can be changed into another prime (64238717) 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, 32119368 + 32119369.

It is an arithmetic number, because the mean of its divisors is an integer number (32119369).

Almost surely, 2^64238737 is an apocalyptic number.

It is an amenable number.

64238737 is a deficient number, since it is larger than the sum of its proper divisors (1).

64238737 is an equidigital number, since it uses as much as digits as its factorization.

64238737 is an evil number, because the sum of its binary digits is even.

The product of its digits is 169344, while the sum is 40.

The square root of 64238737 is about 8014.9071735111. The cubic root of 64238737 is about 400.4967515893.

The spelling of 64238737 in words is "sixty-four million, two hundred thirty-eight thousand, seven hundred thirty-seven".