197977933 has 2 divisors, whose sum is σ = 197977934. Its totient is φ = 197977932.

The previous prime is 197977907. The next prime is 197977957. The reversal of 197977933 is 339779791.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194128489 + 3849444 = 13933^2 + 1962^2 .

It is a cyclic number.

It is not a de Polignac number, because 197977933 - 2¹⁷ = 197846861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197977963) 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 as a sum of consecutive naturals, namely, 98988966 + 98988967.

It is an arithmetic number, because the mean of its divisors is an integer number (98988967).

Almost surely, 2^197977933 is an apocalyptic number.

It is an amenable number.

197977933 is a deficient number, since it is larger than the sum of its proper divisors (1).

197977933 is an equidigital number, since it uses as much as digits as its factorization.

197977933 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2250423, while the sum is 55.

The square root of 197977933 is about 14070.4631409204. The cubic root of 197977933 is about 582.8260148279.

It can be divided in two parts, 19797 and 7933, that added together give a triangular number (27730 = T₂₃₅).

The spelling of 197977933 in words is "one hundred ninety-seven million, nine hundred seventy-seven thousand, nine hundred thirty-three".