1613453997 has 4 divisors (see below), whose sum is σ = 2151272000. Its totient is φ = 1075635996.

The previous prime is 1613453983. The next prime is 1613454013. The reversal of 1613453997 is 7993543161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1613453997 - 2⁴ = 1613453981 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 (1613453917) 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, 268908997 + ... + 268909002.

It is an arithmetic number, because the mean of its divisors is an integer number (537818000).

Almost surely, 2^1613453997 is an apocalyptic number.

It is an amenable number.

1613453997 is a deficient number, since it is larger than the sum of its proper divisors (537818003).

1613453997 is an equidigital number, since it uses as much as digits as its factorization.

1613453997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537818002.

The product of its digits is 612360, while the sum is 48.

The square root of 1613453997 is about 40167.8229059032. The cubic root of 1613453997 is about 1172.8762596326.

The spelling of 1613453997 in words is "one billion, six hundred thirteen million, four hundred fifty-three thousand, nine hundred ninety-seven".