197772349790 has 16 divisors (see below), whose sum is σ = 356307249168. Its totient is φ = 79038491136.

The previous prime is 197772349781. The next prime is 197772349799. The reversal of 197772349790 is 97943277791.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (197772349781) and next prime (197772349799).

It is a super-2 number, since 2×197772349790² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197772349799) 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 in 7 ways as a sum of consecutive naturals, for example, 8794307 + ... + 8816766.

It is an arithmetic number, because the mean of its divisors is an integer number (22269203073).

Almost surely, 2^197772349790 is an apocalyptic number.

197772349790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197772349790 is a deficient number, since it is larger than the sum of its proper divisors (158534899378).

197772349790 is a wasteful number, since it uses less digits than its factorization.

197772349790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17612203.

The product of its (nonzero) digits is 42007896, while the sum is 65.

The spelling of 197772349790 in words is "one hundred ninety-seven billion, seven hundred seventy-two million, three hundred forty-nine thousand, seven hundred ninety".