67509697 has 4 divisors (see below), whose sum is σ = 67548096. Its totient is φ = 67471300.

The previous prime is 67509677. The next prime is 67509727. The reversal of 67509697 is 79690576.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67509697 is a prime.

It is a super-3 number, since 3×67509697³ (a number of 24 digits) contains 333 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 67509697.

It is not an unprimeable number, because it can be changed into a prime (67509677) 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, 16429 + ... + 20122.

It is an arithmetic number, because the mean of its divisors is an integer number (16887024).

Almost surely, 2^67509697 is an apocalyptic number.

It is an amenable number.

67509697 is a deficient number, since it is larger than the sum of its proper divisors (38399).

67509697 is a wasteful number, since it uses less digits than its factorization.

67509697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38398.

The product of its (nonzero) digits is 714420, while the sum is 49.

The square root of 67509697 is about 8216.4284820109. The cubic root of 67509697 is about 407.1821391168.

The spelling of 67509697 in words is "sixty-seven million, five hundred nine thousand, six hundred ninety-seven".