197078431 has 32 divisors (see below), whose sum is σ = 235065600. Its totient is φ = 163296000.

The previous prime is 197078407. The next prime is 197078443. The reversal of 197078431 is 134870791.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197078431 is a prime.

It is a super-2 number, since 2×197078431² = 77679815930843522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197078471) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 933916 + ... + 934126.

It is an arithmetic number, because the mean of its divisors is an integer number (7345800).

Almost surely, 2^197078431 is an apocalyptic number.

197078431 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

197078431 is a deficient number, since it is larger than the sum of its proper divisors (37987169).

197078431 is a wasteful number, since it uses less digits than its factorization.

197078431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 197078431 is about 14038.4625582718. The cubic root of 197078431 is about 581.9419951796.

The spelling of 197078431 in words is "one hundred ninety-seven million, seventy-eight thousand, four hundred thirty-one".