67740997 has 4 divisors (see below), whose sum is σ = 67759776. Its totient is φ = 67722220.

The previous prime is 67740991. The next prime is 67741001. The reversal of 67740997 is 79904776.

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 not a de Polignac number, because 67740997 - 2³ = 67740989 is a prime.

It is a super-3 number, since 3×67740997³ (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 67740997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67740991) 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, 2083 + ... + 11824.

It is an arithmetic number, because the mean of its divisors is an integer number (16939944).

Almost surely, 2^67740997 is an apocalyptic number.

It is an amenable number.

67740997 is a deficient number, since it is larger than the sum of its proper divisors (18779).

67740997 is a wasteful number, since it uses less digits than its factorization.

67740997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18778.

The product of its (nonzero) digits is 666792, while the sum is 49.

The square root of 67740997 is about 8230.4919051051. The cubic root of 67740997 is about 407.6466347216.

The spelling of 67740997 in words is "sixty-seven million, seven hundred forty thousand, nine hundred ninety-seven".