61634 has 4 divisors (see below), whose sum is σ = 92454. Its totient is φ = 30816.

The previous prime is 61631. The next prime is 61637. The reversal of 61634 is 43616.

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

It is an interprime number because it is at equal distance from previous prime (61631) and next prime (61637).

It can be written as a sum of positive squares in only one way, i.e., 61009 + 625 = 247^2 + 25^2 .

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a plaindrome in base 7 and base 15.

It is not an unprimeable number, because it can be changed into a prime (61631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15407 + ... + 15410.

2⁶¹⁶³⁴ is an apocalyptic number.

61634 is a deficient number, since it is larger than the sum of its proper divisors (30820).

61634 is a wasteful number, since it uses less digits than its factorization.

61634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30819.

The product of its digits is 432, while the sum is 20.

The square root of 61634 is about 248.2619584230. The cubic root of 61634 is about 39.5008812494.

The spelling of 61634 in words is "sixty-one thousand, six hundred thirty-four".