1997623622 has 16 divisors (see below), whose sum is σ = 3006214992. Its totient is φ = 995558400.

The previous prime is 1997623619. The next prime is 1997623637. The reversal of 1997623622 is 2263267991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1375997 + ... + 1377447.

It is an arithmetic number, because the mean of its divisors is an integer number (187888437).

Almost surely, 2^1997623622 is an apocalyptic number.

1997623622 is a deficient number, since it is larger than the sum of its proper divisors (1008591370).

1997623622 is a wasteful number, since it uses less digits than its factorization.

1997623622 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3223.

The product of its digits is 489888, while the sum is 47.

The square root of 1997623622 is about 44694.7829393991. The cubic root of 1997623622 is about 1259.4218440149.

The spelling of 1997623622 in words is "one billion, nine hundred ninety-seven million, six hundred twenty-three thousand, six hundred twenty-two".