67642797 has 4 divisors (see below), whose sum is σ = 90190400. Its totient is φ = 45095196.

The previous prime is 67642789. The next prime is 67642843. The reversal of 67642797 is 79724676.

It is a happy number.

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 not a de Polignac number, because 67642797 - 2³ = 67642789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67642097) 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, 11273797 + ... + 11273802.

It is an arithmetic number, because the mean of its divisors is an integer number (22547600).

Almost surely, 2^67642797 is an apocalyptic number.

It is an amenable number.

67642797 is a deficient number, since it is larger than the sum of its proper divisors (22547603).

67642797 is a wasteful number, since it uses less digits than its factorization.

67642797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22547602.

The product of its digits is 889056, while the sum is 48.

The square root of 67642797 is about 8224.5241199719. The cubic root of 67642797 is about 407.4495592904.

The spelling of 67642797 in words is "sixty-seven million, six hundred forty-two thousand, seven hundred ninety-seven".