424687509 has 8 divisors (see below), whose sum is σ = 629166720. Its totient is φ = 283124988.

The previous prime is 424687481. The next prime is 424687519. The reversal of 424687509 is 905786424.

It is a happy number.

It is not a de Polignac number, because 424687509 - 2²⁸ = 156252053 is a prime.

It is a super-4 number, since 4×424687509⁴ (a number of 36 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424687519) 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, 7864557 + ... + 7864610.

It is an arithmetic number, because the mean of its divisors is an integer number (78645840).

Almost surely, 2^424687509 is an apocalyptic number.

It is an amenable number.

424687509 is a deficient number, since it is larger than the sum of its proper divisors (204479211).

424687509 is a wasteful number, since it uses less digits than its factorization.

424687509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15729176 (or 15729170 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The square root of 424687509 is about 20607.9477144135. The cubic root of 424687509 is about 751.6629819295.

The spelling of 424687509 in words is "four hundred twenty-four million, six hundred eighty-seven thousand, five hundred nine".