745721863 has 8 divisors (see below), whose sum is σ = 775900800. Its totient is φ = 715840608.

The previous prime is 745721857. The next prime is 745721869. The reversal of 745721863 is 368127547.

It is an interprime number because it is at equal distance from previous prime (745721857) and next prime (745721869).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 745721863 - 2⁵ = 745721831 is a prime.

It is a super-2 number, since 2×745721863² = 1112202193912381538, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745721869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69303 + ... + 79336.

It is an arithmetic number, because the mean of its divisors is an integer number (96987600).

Almost surely, 2^745721863 is an apocalyptic number.

745721863 is a deficient number, since it is larger than the sum of its proper divisors (30178937).

745721863 is a wasteful number, since it uses less digits than its factorization.

745721863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148841.

The product of its digits is 282240, while the sum is 43.

The square root of 745721863 is about 27307.9084332726. The cubic root of 745721863 is about 906.8294699509.

The spelling of 745721863 in words is "seven hundred forty-five million, seven hundred twenty-one thousand, eight hundred sixty-three".