614469991 has 4 divisors (see below), whose sum is σ = 616231000. Its totient is φ = 612708984.

The previous prime is 614469983. The next prime is 614470027. The reversal of 614469991 is 199964416.

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 614469991 - 2³ = 614469983 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 (614469971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 879981 + ... + 880678.

It is an arithmetic number, because the mean of its divisors is an integer number (154057750).

Almost surely, 2^614469991 is an apocalyptic number.

614469991 is a deficient number, since it is larger than the sum of its proper divisors (1761009).

614469991 is a wasteful number, since it uses less digits than its factorization.

614469991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1761008.

The product of its digits is 419904, while the sum is 49.

The square root of 614469991 is about 24788.5052191535. The cubic root of 614469991 is about 850.1591356030.

The spelling of 614469991 in words is "six hundred fourteen million, four hundred sixty-nine thousand, nine hundred ninety-one".