197207311390 has 32 divisors (see below), whose sum is σ = 370472610816. Its totient is φ = 75439821600.

The previous prime is 197207311361. The next prime is 197207311391. The reversal of 197207311390 is 93113702791.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197207311391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1272459 + ... + 1419001.

It is an arithmetic number, because the mean of its divisors is an integer number (11577269088).

Almost surely, 2^197207311390 is an apocalyptic number.

197207311390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197207311390 is a deficient number, since it is larger than the sum of its proper divisors (173265299426).

197207311390 is a wasteful number, since it uses less digits than its factorization.

197207311390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152424.

The product of its (nonzero) digits is 71442, while the sum is 43.

The spelling of 197207311390 in words is "one hundred ninety-seven billion, two hundred seven million, three hundred eleven thousand, three hundred ninety".