197678629 has 4 divisors (see below), whose sum is σ = 206273376. Its totient is φ = 189083884.

The previous prime is 197678483. The next prime is 197678633. The reversal of 197678629 is 926876791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 197678629 - 2¹³ = 197670437 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 197678629.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197678639) 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 in 3 ways as a sum of consecutive naturals, for example, 4297339 + ... + 4297384.

It is an arithmetic number, because the mean of its divisors is an integer number (51568344).

Almost surely, 2^197678629 is an apocalyptic number.

It is an amenable number.

197678629 is a deficient number, since it is larger than the sum of its proper divisors (8594747).

197678629 is an equidigital number, since it uses as much as digits as its factorization.

197678629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8594746.

The product of its digits is 2286144, while the sum is 55.

The square root of 197678629 is about 14059.8232207948. The cubic root of 197678629 is about 582.5321602953.

The spelling of 197678629 in words is "one hundred ninety-seven million, six hundred seventy-eight thousand, six hundred twenty-nine".