1997015263 has 4 divisors (see below), whose sum is σ = 2010418200. Its totient is φ = 1983612328.

The previous prime is 1997015243. The next prime is 1997015309. The reversal of 1997015263 is 3625107991.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1997015263 - 2⁵ = 1997015231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997015243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6701245 + ... + 6701542.

It is an arithmetic number, because the mean of its divisors is an integer number (502604550).

Almost surely, 2^1997015263 is an apocalyptic number.

1997015263 is a deficient number, since it is larger than the sum of its proper divisors (13402937).

1997015263 is a wasteful number, since it uses less digits than its factorization.

1997015263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13402936.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 1997015263 is about 44687.9767163384. The cubic root of 1997015263 is about 1259.2939823569.

The spelling of 1997015263 in words is "one billion, nine hundred ninety-seven million, fifteen thousand, two hundred sixty-three".