1997362457 has 8 divisors (see below), whose sum is σ = 2062374912. Its totient is φ = 1932386400.

The previous prime is 1997362439. The next prime is 1997362463. The reversal of 1997362457 is 7542637991.

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

It is a cyclic number.

It is not a de Polignac number, because 1997362457 - 2⁸ = 1997362201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1997362399 and 1997362408.

It is not an unprimeable number, because it can be changed into a prime (1994362457) 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, 143093 + ... + 156429.

It is an arithmetic number, because the mean of its divisors is an integer number (257796864).

Almost surely, 2^1997362457 is an apocalyptic number.

It is an amenable number.

1997362457 is a deficient number, since it is larger than the sum of its proper divisors (65012455).

1997362457 is a wasteful number, since it uses less digits than its factorization.

1997362457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18199.

The product of its digits is 2857680, while the sum is 53.

The square root of 1997362457 is about 44691.8611941817. The cubic root of 1997362457 is about 1259.3669569252.

The spelling of 1997362457 in words is "one billion, nine hundred ninety-seven million, three hundred sixty-two thousand, four hundred fifty-seven".