197490151 has 2 divisors, whose sum is σ = 197490152. Its totient is φ = 197490150.

The previous prime is 197490109. The next prime is 197490211. The reversal of 197490151 is 151094791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 197490151 - 2⁹ = 197489639 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 197490151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197496151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98745075 + 98745076.

It is an arithmetic number, because the mean of its divisors is an integer number (98745076).

Almost surely, 2^197490151 is an apocalyptic number.

197490151 is a deficient number, since it is larger than the sum of its proper divisors (1).

197490151 is an equidigital number, since it uses as much as digits as its factorization.

197490151 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 37.

The square root of 197490151 is about 14053.1189064919. The cubic root of 197490151 is about 582.3469617058.

The spelling of 197490151 in words is "one hundred ninety-seven million, four hundred ninety thousand, one hundred fifty-one".