67491379 has 2 divisors, whose sum is σ = 67491380. Its totient is φ = 67491378.

The previous prime is 67491353. The next prime is 67491443. The reversal of 67491379 is 97319476.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 67491379 - 2¹⁹ = 66967091 is a prime.

It is not a weakly prime, because it can be changed into another prime (67491329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33745689 + 33745690.

It is an arithmetic number, because the mean of its divisors is an integer number (33745690).

Almost surely, 2^67491379 is an apocalyptic number.

67491379 is a deficient number, since it is larger than the sum of its proper divisors (1).

67491379 is an equidigital number, since it uses as much as digits as its factorization.

67491379 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 46.

The square root of 67491379 is about 8215.3136884723. The cubic root of 67491379 is about 407.1453076814.

It can be divided in two parts, 6749 and 1379, that added together give a triangular number (8128 = T₁₂₇).

The spelling of 67491379 in words is "sixty-seven million, four hundred ninety-one thousand, three hundred seventy-nine".