197631 has 12 divisors (see below), whose sum is σ = 326352. Its totient is φ = 112896.

The previous prime is 197621. The next prime is 197641. The reversal of 197631 is 136791.

It is an interprime number because it is at equal distance from previous prime (197621) and next prime (197641).

It is not a de Polignac number, because 197631 - 2⁵ = 197599 is a prime.

It is a super-2 number, since 2×197631² = 78116024322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 197595 and 197604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1506 + ... + 1631.

It is an arithmetic number, because the mean of its divisors is an integer number (27196).

2¹⁹⁷⁶³¹ is an apocalyptic number.

197631 is a deficient number, since it is larger than the sum of its proper divisors (128721).

197631 is a wasteful number, since it uses less digits than its factorization.

197631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3150 (or 3147 counting only the distinct ones).

The product of its digits is 1134, while the sum is 27.

The square root of 197631 is about 444.5570829489. The cubic root of 197631 is about 58.2485371132.

Adding to 197631 its product of digits (1134), we get a triangular number (198765 = T₆₃₀).

It can be divided in two parts, 197 and 631, that added together give a palindrome (828).

The spelling of 197631 in words is "one hundred ninety-seven thousand, six hundred thirty-one".