731687045 has 6 divisors (see below), whose sum is σ = 878097042. Its totient is φ = 585301248.

The previous prime is 731687027. The next prime is 731687051. The reversal of 731687045 is 540786137.

It can be written as a sum of positive squares in 3 ways, for example, as 62378404 + 669308641 = 7898^2 + 25871^2 .

It is not a de Polignac number, because 731687045 - 2¹² = 731682949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 731686993 and 731687011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 54437 + ... + 66533.

It is an arithmetic number, because the mean of its divisors is an integer number (146349507).

Almost surely, 2^731687045 is an apocalyptic number.

It is an amenable number.

731687045 is a deficient number, since it is larger than the sum of its proper divisors (146409997).

731687045 is an frugal number, since it uses more digits than its factorization.

731687045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24199 (or 12102 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 41.

The square root of 731687045 is about 27049.7143238150. The cubic root of 731687045 is about 901.1044240006.

Multiplying 731687045 by its product of nonzero digits (141120), we get a square (103255675790400 = 10161480²).

The spelling of 731687045 in words is "seven hundred thirty-one million, six hundred eighty-seven thousand, forty-five".