67154989 has 4 divisors (see below), whose sum is σ = 73260000. Its totient is φ = 61049980.

The previous prime is 67154953. The next prime is 67154993. The reversal of 67154989 is 98945176.

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-67154989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67154939) 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, 3052489 + ... + 3052510.

It is an arithmetic number, because the mean of its divisors is an integer number (18315000).

Almost surely, 2^67154989 is an apocalyptic number.

It is an amenable number.

67154989 is a deficient number, since it is larger than the sum of its proper divisors (6105011).

67154989 is a wasteful number, since it uses less digits than its factorization.

67154989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6105010.

The product of its digits is 544320, while the sum is 49.

The square root of 67154989 is about 8194.8147630072. The cubic root of 67154989 is about 406.4677505939.

The spelling of 67154989 in words is "sixty-seven million, one hundred fifty-four thousand, nine hundred eighty-nine".