1035537661 has 4 divisors (see below), whose sum is σ = 1035682524. Its totient is φ = 1035392800.

The previous prime is 1035537649. The next prime is 1035537689. The reversal of 1035537661 is 1667355301.

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 515971225 + 519566436 = 22715^2 + 22794^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1035537661 is a prime.

It is a super-3 number, since 3×1035537661³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1035537661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1035537641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61120 + ... + 76201.

It is an arithmetic number, because the mean of its divisors is an integer number (258920631).

Almost surely, 2^1035537661 is an apocalyptic number.

It is an amenable number.

1035537661 is a deficient number, since it is larger than the sum of its proper divisors (144863).

1035537661 is an equidigital number, since it uses as much as digits as its factorization.

1035537661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144862.

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 1035537661 is about 32179.7709904841. The cubic root of 1035537661 is about 1011.7082684463.

The spelling of 1035537661 in words is "one billion, thirty-five million, five hundred thirty-seven thousand, six hundred sixty-one".