416720639 has 4 divisors (see below), whose sum is σ = 418464480. Its totient is φ = 414976800.

The previous prime is 416720621. The next prime is 416720641. The reversal of 416720639 is 936027614.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 936027614 = 2 ⋅468013807.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-416720639 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 (416710639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 871562 + ... + 872039.

It is an arithmetic number, because the mean of its divisors is an integer number (104616120).

Almost surely, 2^416720639 is an apocalyptic number.

416720639 is a deficient number, since it is larger than the sum of its proper divisors (1743841).

416720639 is a wasteful number, since it uses less digits than its factorization.

416720639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743840.

The product of its (nonzero) digits is 54432, while the sum is 38.

The square root of 416720639 is about 20413.7365271525. The cubic root of 416720639 is about 746.9330392833.

The spelling of 416720639 in words is "four hundred sixteen million, seven hundred twenty thousand, six hundred thirty-nine".