64731707 has 2 divisors, whose sum is σ = 64731708. Its totient is φ = 64731706.

The previous prime is 64731671. The next prime is 64731739. The reversal of 64731707 is 70713746.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64731707 - 2¹⁰ = 64730683 is a prime.

It is a super-2 number, since 2×64731707² = 8380387782267698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64731787) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32365853 + 32365854.

It is an arithmetic number, because the mean of its divisors is an integer number (32365854).

Almost surely, 2^64731707 is an apocalyptic number.

64731707 is a deficient number, since it is larger than the sum of its proper divisors (1).

64731707 is an equidigital number, since it uses as much as digits as its factorization.

64731707 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24696, while the sum is 35.

The square root of 64731707 is about 8045.6017177089. The cubic root of 64731707 is about 401.5186167946.

The spelling of 64731707 in words is "sixty-four million, seven hundred thirty-one thousand, seven hundred seven".