67400407 has 2 divisors, whose sum is σ = 67400408. Its totient is φ = 67400406.

The previous prime is 67400387. The next prime is 67400413. The reversal of 67400407 is 70400476.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67400407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67400447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33700203 + 33700204.

It is an arithmetic number, because the mean of its divisors is an integer number (33700204).

Almost surely, 2^67400407 is an apocalyptic number.

67400407 is a deficient number, since it is larger than the sum of its proper divisors (1).

67400407 is an equidigital number, since it uses as much as digits as its factorization.

67400407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 67400407 is about 8209.7750882713. The cubic root of 67400407 is about 406.9622942972.

The spelling of 67400407 in words is "sixty-seven million, four hundred thousand, four hundred seven".