1997388070 has 8 divisors (see below), whose sum is σ = 3595298544. Its totient is φ = 798955224.

The previous prime is 1997388059. The next prime is 1997388077. The reversal of 1997388070 is 708837991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1997387999 and 1997388017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997388077) 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, 99869394 + ... + 99869413.

It is an arithmetic number, because the mean of its divisors is an integer number (449412318).

Almost surely, 2^1997388070 is an apocalyptic number.

1997388070 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1997388070 is a deficient number, since it is larger than the sum of its proper divisors (1597910474).

1997388070 is a wasteful number, since it uses less digits than its factorization.

1997388070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199738814.

The product of its (nonzero) digits is 762048, while the sum is 52.

The square root of 1997388070 is about 44692.1477443186. The cubic root of 1997388070 is about 1259.3723400289.

The spelling of 1997388070 in words is "one billion, nine hundred ninety-seven million, three hundred eighty-eight thousand, seventy".