197980501 has 2 divisors, whose sum is σ = 197980502. Its totient is φ = 197980500.

The previous prime is 197980421. The next prime is 197980507. The reversal of 197980501 is 105089791.

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., 184253476 + 13727025 = 13574^2 + 3705^2 .

It is a cyclic number.

It is not a de Polignac number, because 197980501 - 2¹⁷ = 197849429 is a prime.

It is a super-2 number, since 2×197980501² = 78392557552422002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197980507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98990250 + 98990251.

It is an arithmetic number, because the mean of its divisors is an integer number (98990251).

Almost surely, 2^197980501 is an apocalyptic number.

It is an amenable number.

197980501 is a deficient number, since it is larger than the sum of its proper divisors (1).

197980501 is an equidigital number, since it uses as much as digits as its factorization.

197980501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 40.

The square root of 197980501 is about 14070.5543956164. The cubic root of 197980501 is about 582.8285347902.

The spelling of 197980501 in words is "one hundred ninety-seven million, nine hundred eighty thousand, five hundred one".