67978903 has 8 divisors (see below), whose sum is σ = 75766320. Its totient is φ = 60612480.

The previous prime is 67978849. The next prime is 67978907. The reversal of 67978903 is 30987976.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-67978903 is a prime.

It is a super-2 number, since 2×67978903² = 9242262506166818, 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 (67978907) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104908 + ... + 105553.

It is an arithmetic number, because the mean of its divisors is an integer number (9470790).

Almost surely, 2^67978903 is an apocalyptic number.

67978903 is a deficient number, since it is larger than the sum of its proper divisors (7787417).

67978903 is a wasteful number, since it uses less digits than its factorization.

67978903 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210497.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 67978903 is about 8244.9319584821. The cubic root of 67978903 is about 408.1232947091.

The spelling of 67978903 in words is "sixty-seven million, nine hundred seventy-eight thousand, nine hundred three".