1997741936 has 20 divisors (see below), whose sum is σ = 3896607000. Its totient is φ = 992165952.

The previous prime is 1997741903. The next prime is 1997741939. The reversal of 1997741936 is 6391477991.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997741939) 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 3 ways as a sum of consecutive naturals, for example, 416606 + ... + 421373.

It is an arithmetic number, because the mean of its divisors is an integer number (194830350).

Almost surely, 2^1997741936 is an apocalyptic number.

1997741936 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1997741936 is a deficient number, since it is larger than the sum of its proper divisors (1898865064).

1997741936 is a wasteful number, since it uses less digits than its factorization.

1997741936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838136 (or 838130 counting only the distinct ones).

The product of its digits is 2571912, while the sum is 56.

The square root of 1997741936 is about 44696.1064970988. The cubic root of 1997741936 is about 1259.4467076066.

The spelling of 1997741936 in words is "one billion, nine hundred ninety-seven million, seven hundred forty-one thousand, nine hundred thirty-six".