730612531 has 8 divisors (see below), whose sum is σ = 802110384. Its totient is φ = 659961120.

The previous prime is 730612523. The next prime is 730612541. The reversal of 730612531 is 135216037.

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 730612531 - 2³ = 730612523 is a prime.

It is a super-2 number, since 2×730612531² = 1067589340908451922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 730612531.

It is not an unprimeable number, because it can be changed into a prime (730612541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209800 + ... + 213253.

It is an arithmetic number, because the mean of its divisors is an integer number (100263798).

Almost surely, 2^730612531 is an apocalyptic number.

730612531 is a deficient number, since it is larger than the sum of its proper divisors (71497853).

730612531 is a wasteful number, since it uses less digits than its factorization.

730612531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423221.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 730612531 is about 27029.8451900857. The cubic root of 730612531 is about 900.6631043204.

Adding to 730612531 its reverse (135216037), we get a palindrome (865828568).

The spelling of 730612531 in words is "seven hundred thirty million, six hundred twelve thousand, five hundred thirty-one".