64749541 has 2 divisors, whose sum is σ = 64749542. Its totient is φ = 64749540.

The previous prime is 64749539. The next prime is 64749557. The reversal of 64749541 is 14594746.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61701025 + 3048516 = 7855^2 + 1746^2 .

It is a cyclic number.

It is not a de Polignac number, because 64749541 - 2¹ = 64749539 is a prime.

Together with 64749539, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 64749494 and 64749503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (64749571) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32374770 + 32374771.

It is an arithmetic number, because the mean of its divisors is an integer number (32374771).

Almost surely, 2^64749541 is an apocalyptic number.

It is an amenable number.

64749541 is a deficient number, since it is larger than the sum of its proper divisors (1).

64749541 is an equidigital number, since it uses as much as digits as its factorization.

64749541 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 64749541 is about 8046.7099487927. The cubic root of 64749541 is about 401.5554870593. Note that the first 3 decimals are identical.

The spelling of 64749541 in words is "sixty-four million, seven hundred forty-nine thousand, five hundred forty-one".