1953505837 has 2 divisors, whose sum is σ = 1953505838. Its totient is φ = 1953505836.

The previous prime is 1953505823. The next prime is 1953505847. The reversal of 1953505837 is 7385053591.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1198959876 + 754545961 = 34626^2 + 27469^2 .

It is a cyclic number.

It is not a de Polignac number, because 1953505837 - 2⁷ = 1953505709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1953505847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 976752918 + 976752919.

It is an arithmetic number, because the mean of its divisors is an integer number (976752919).

Almost surely, 2^1953505837 is an apocalyptic number.

It is an amenable number.

1953505837 is a deficient number, since it is larger than the sum of its proper divisors (1).

1953505837 is an equidigital number, since it uses as much as digits as its factorization.

1953505837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567000, while the sum is 46.

The square root of 1953505837 is about 44198.4822929476. The cubic root of 1953505837 is about 1250.0812399466.

The spelling of 1953505837 in words is "one billion, nine hundred fifty-three million, five hundred five thousand, eight hundred thirty-seven".