1997030641 has 8 divisors (see below), whose sum is σ = 2018352960. Its totient is φ = 1975745712.

The previous prime is 1997030621. The next prime is 1997030687. The reversal of 1997030641 is 1460307991.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1997030641 is a prime.

It is a super-3 number, since 3×1997030641³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1997030594 and 1997030603.

It is not an unprimeable number, because it can be changed into a prime (1997030621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 105486 + ... + 122968.

It is an arithmetic number, because the mean of its divisors is an integer number (252294120).

Almost surely, 2^1997030641 is an apocalyptic number.

It is an amenable number.

1997030641 is a deficient number, since it is larger than the sum of its proper divisors (21322319).

1997030641 is a wasteful number, since it uses less digits than its factorization.

1997030641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18695.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 1997030641 is about 44688.1487757101. The cubic root of 1997030641 is about 1259.2972147431.

The spelling of 1997030641 in words is "one billion, nine hundred ninety-seven million, thirty thousand, six hundred forty-one".