67491794 has 4 divisors (see below), whose sum is σ = 101237694. Its totient is φ = 33745896.

The previous prime is 67491793. The next prime is 67491799. The reversal of 67491794 is 49719476.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 54567769 + 12924025 = 7387^2 + 3595^2 .

It is not an unprimeable number, because it can be changed into a prime (67491791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16872947 + ... + 16872950.

Almost surely, 2^67491794 is an apocalyptic number.

67491794 is a deficient number, since it is larger than the sum of its proper divisors (33745900).

67491794 is a wasteful number, since it uses less digits than its factorization.

67491794 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33745899.

The product of its digits is 381024, while the sum is 47.

The square root of 67491794 is about 8215.3389461421. The cubic root of 67491794 is about 407.1461421828.

The spelling of 67491794 in words is "sixty-seven million, four hundred ninety-one thousand, seven hundred ninety-four".