61197631 has 8 divisors (see below), whose sum is σ = 66832128. Its totient is φ = 55575000.

The previous prime is 61197607. The next prime is 61197649. The reversal of 61197631 is 13679116.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61197631 - 2¹¹ = 61195583 is a prime.

It is a super-2 number, since 2×61197631² = 7490300080024322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61197601) 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 7 ways as a sum of consecutive naturals, for example, 10506 + ... + 15256.

It is an arithmetic number, because the mean of its divisors is an integer number (8354016).

Almost surely, 2^61197631 is an apocalyptic number.

61197631 is a deficient number, since it is larger than the sum of its proper divisors (5634497).

61197631 is a wasteful number, since it uses less digits than its factorization.

61197631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5933.

The product of its digits is 6804, while the sum is 34.

The square root of 61197631 is about 7822.8914731063. The cubic root of 61197631 is about 394.0743823595.

The spelling of 61197631 in words is "sixty-one million, one hundred ninety-seven thousand, six hundred thirty-one".