678133507 has 2 divisors, whose sum is σ = 678133508. Its totient is φ = 678133506.

The previous prime is 678133471. The next prime is 678133517. The reversal of 678133507 is 705331876.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 678133507 - 2¹¹ = 678131459 is a prime.

It is a super-2 number, since 2×678133507² = 919730106632238098, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 678133507.

It is not a weakly prime, because it can be changed into another prime (678133517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339066753 + 339066754.

It is an arithmetic number, because the mean of its divisors is an integer number (339066754).

Almost surely, 2^678133507 is an apocalyptic number.

678133507 is a deficient number, since it is larger than the sum of its proper divisors (1).

678133507 is an equidigital number, since it uses as much as digits as its factorization.

678133507 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 40.

The square root of 678133507 is about 26040.9966591143. The cubic root of 678133507 is about 878.5606234579.

The spelling of 678133507 in words is "six hundred seventy-eight million, one hundred thirty-three thousand, five hundred seven".