1997877122 has 8 divisors (see below), whose sum is σ = 3006391116. Its totient is φ = 995746752.

The previous prime is 1997877109. The next prime is 1997877139. The reversal of 1997877122 is 2217787991.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1943839921 + 54037201 = 44089^2 + 7351^2 .

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

It is a super-2 number, since 2×1997877122² = 7983025989222005768, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1595123 + ... + 1596374.

Almost surely, 2^1997877122 is an apocalyptic number.

1997877122 is a deficient number, since it is larger than the sum of its proper divisors (1008513994).

1997877122 is a wasteful number, since it uses less digits than its factorization.

1997877122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3191812.

The product of its digits is 889056, while the sum is 53.

The square root of 1997877122 is about 44697.6187508910. The cubic root of 1997877122 is about 1259.4751156339.

The spelling of 1997877122 in words is "one billion, nine hundred ninety-seven million, eight hundred seventy-seven thousand, one hundred twenty-two".