521069494 has 8 divisors (see below), whose sum is σ = 852659208. Its totient is φ = 236849760.

The previous prime is 521069491. The next prime is 521069513. The reversal of 521069494 is 494960125.

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

It is a super-3 number, since 3×521069494³ (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521069491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11842467 + ... + 11842510.

It is an arithmetic number, because the mean of its divisors is an integer number (106582401).

Almost surely, 2^521069494 is an apocalyptic number.

521069494 is a deficient number, since it is larger than the sum of its proper divisors (331589714).

521069494 is a wasteful number, since it uses less digits than its factorization.

521069494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23684990.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 521069494 is about 22826.9466639759. The cubic root of 521069494 is about 804.6960744584.

The spelling of 521069494 in words is "five hundred twenty-one million, sixty-nine thousand, four hundred ninety-four".