61069537 has 4 divisors (see below), whose sum is σ = 61906180. Its totient is φ = 60232896.

The previous prime is 61069529. The next prime is 61069643. The reversal of 61069537 is 73596016.

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 45037521 + 16032016 = 6711^2 + 4004^2 .

It is a cyclic number.

It is not a de Polignac number, because 61069537 - 2³ = 61069529 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61069496 and 61069505.

It is not an unprimeable number, because it can be changed into a prime (61069507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 418212 + ... + 418357.

It is an arithmetic number, because the mean of its divisors is an integer number (15476545).

Almost surely, 2^61069537 is an apocalyptic number.

It is an amenable number.

61069537 is a deficient number, since it is larger than the sum of its proper divisors (836643).

61069537 is an equidigital number, since it uses as much as digits as its factorization.

61069537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836642.

The product of its (nonzero) digits is 34020, while the sum is 37.

The square root of 61069537 is about 7814.7000582236. The cubic root of 61069537 is about 393.7992419478.

The spelling of 61069537 in words is "sixty-one million, sixty-nine thousand, five hundred thirty-seven".