67899397 has 4 divisors (see below), whose sum is σ = 68240800. Its totient is φ = 67557996.

The previous prime is 67899379. The next prime is 67899401. The reversal of 67899397 is 79399876.

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-67899397 is a prime.

It is a super-2 number, since 2×67899397² = 9220656225927218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67899347) 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, 170403 + ... + 170800.

It is an arithmetic number, because the mean of its divisors is an integer number (17060200).

Almost surely, 2^67899397 is an apocalyptic number.

It is an amenable number.

67899397 is a deficient number, since it is larger than the sum of its proper divisors (341403).

67899397 is a wasteful number, since it uses less digits than its factorization.

67899397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341402.

The product of its digits is 5143824, while the sum is 58.

The square root of 67899397 is about 8240.1090405407. The cubic root of 67899397 is about 407.9641232230.

The spelling of 67899397 in words is "sixty-seven million, eight hundred ninety-nine thousand, three hundred ninety-seven".