617998151 has 4 divisors (see below), whose sum is σ = 627222072. Its totient is φ = 608774232.

The previous prime is 617998141. The next prime is 617998169. The reversal of 617998151 is 151899716.

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 617998151 - 2²² = 613803847 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 617998096 and 617998105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617998141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4611860 + ... + 4611993.

It is an arithmetic number, because the mean of its divisors is an integer number (156805518).

Almost surely, 2^617998151 is an apocalyptic number.

617998151 is a deficient number, since it is larger than the sum of its proper divisors (9223921).

617998151 is an equidigital number, since it uses as much as digits as its factorization.

617998151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9223920.

The product of its digits is 136080, while the sum is 47.

The square root of 617998151 is about 24859.5686004404. The cubic root of 617998151 is about 851.7831774116.

The spelling of 617998151 in words is "six hundred seventeen million, nine hundred ninety-eight thousand, one hundred fifty-one".