3645731029 has 4 divisors (see below), whose sum is σ = 3734651340. Its totient is φ = 3556810720.

The previous prime is 3645731017. The next prime is 3645731051. The reversal of 3645731029 is 9201375463.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1095279025 + 2550452004 = 33095^2 + 50502^2 .

It is a cyclic number.

It is not a de Polignac number, because 3645731029 - 2²⁷ = 3511513301 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3645730982 and 3645731000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3645731329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44460094 + ... + 44460175.

It is an arithmetic number, because the mean of its divisors is an integer number (933662835).

Almost surely, 2^3645731029 is an apocalyptic number.

It is an amenable number.

3645731029 is a deficient number, since it is larger than the sum of its proper divisors (88920311).

3645731029 is an equidigital number, since it uses as much as digits as its factorization.

3645731029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88920310.

The product of its (nonzero) digits is 136080, while the sum is 40.

The square root of 3645731029 is about 60379.8892761489. The cubic root of 3645731029 is about 1539.0812292475.

The spelling of 3645731029 in words is "three billion, six hundred forty-five million, seven hundred thirty-one thousand, twenty-nine".