61698631 has 8 divisors (see below), whose sum is σ = 64597680. Its totient is φ = 58851072.

The previous prime is 61698629. The next prime is 61698641. The reversal of 61698631 is 13689616.

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 61698631 - 2¹ = 61698629 is a prime.

It is a super-2 number, since 2×61698631² = 7613442134548322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61698641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10410 + ... + 15223.

It is an arithmetic number, because the mean of its divisors is an integer number (8074710).

Almost surely, 2^61698631 is an apocalyptic number.

61698631 is a deficient number, since it is larger than the sum of its proper divisors (2899049).

61698631 is a wasteful number, since it uses less digits than its factorization.

61698631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25745.

The product of its digits is 46656, while the sum is 40.

The square root of 61698631 is about 7854.8476115072. The cubic root of 61698631 is about 395.1468363983.

The spelling of 61698631 in words is "sixty-one million, six hundred ninety-eight thousand, six hundred thirty-one".