613754991 has 6 divisors (see below), whose sum is σ = 886535000. Its totient is φ = 409169988.

The previous prime is 613754951. The next prime is 613755073. The reversal of 613754991 is 199457316.

613754991 is a `hidden beast` number, since 6 + 13 + 7 + 549 + 91 = 666.

It is not a de Polignac number, because 613754991 - 2⁷ = 613754863 is a prime.

It is a super-4 number, since 4×613754991⁴ (a number of 36 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613754951) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34097491 + ... + 34097508.

Almost surely, 2^613754991 is an apocalyptic number.

613754991 is a deficient number, since it is larger than the sum of its proper divisors (272780009).

613754991 is a wasteful number, since it uses less digits than its factorization.

613754991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68195005 (or 68195002 counting only the distinct ones).

The product of its digits is 204120, while the sum is 45.

The square root of 613754991 is about 24774.0790141632. The cubic root of 613754991 is about 849.8292579770.

It can be divided in two parts, 61375 and 4991, that added together give a palindrome (66366).

The spelling of 613754991 in words is "six hundred thirteen million, seven hundred fifty-four thousand, nine hundred ninety-one".