64143953 has 2 divisors, whose sum is σ = 64143954. Its totient is φ = 64143952.

The previous prime is 64143901. The next prime is 64143973. The reversal of 64143953 is 35934146.

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., 60964864 + 3179089 = 7808^2 + 1783^2 .

It is a cyclic number.

It is not a de Polignac number, because 64143953 - 2⁶ = 64143889 is a prime.

It is a super-2 number, since 2×64143953² = 8228893412932418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (64143973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32071976 + 32071977.

It is an arithmetic number, because the mean of its divisors is an integer number (32071977).

Almost surely, 2^64143953 is an apocalyptic number.

It is an amenable number.

64143953 is a deficient number, since it is larger than the sum of its proper divisors (1).

64143953 is an equidigital number, since it uses as much as digits as its factorization.

64143953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 35.

The square root of 64143953 is about 8008.9920089859. The cubic root of 64143953 is about 400.2996775107.

The spelling of 64143953 in words is "sixty-four million, one hundred forty-three thousand, nine hundred fifty-three".