61673531 has 2 divisors, whose sum is σ = 61673532. Its totient is φ = 61673530.

The previous prime is 61673497. The next prime is 61673611. The reversal of 61673531 is 13537616.

61673531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61673531 is a prime.

It is a super-2 number, since 2×61673531² = 7607248852015922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61675531) 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, 30836765 + 30836766.

It is an arithmetic number, because the mean of its divisors is an integer number (30836766).

Almost surely, 2^61673531 is an apocalyptic number.

61673531 is a deficient number, since it is larger than the sum of its proper divisors (1).

61673531 is an equidigital number, since it uses as much as digits as its factorization.

61673531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 32.

The square root of 61673531 is about 7853.2497095152. The cubic root of 61673531 is about 395.0932450911.

It can be divided in two parts, 616 and 73531, that added together give a palindrome (74147).

The spelling of 61673531 in words is "sixty-one million, six hundred seventy-three thousand, five hundred thirty-one".