69978607 has 2 divisors, whose sum is σ = 69978608. Its totient is φ = 69978606.

The previous prime is 69978599. The next prime is 69978617. The reversal of 69978607 is 70687996.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 69978607 - 2³ = 69978599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69978617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34989303 + 34989304.

It is an arithmetic number, because the mean of its divisors is an integer number (34989304).

Almost surely, 2^69978607 is an apocalyptic number.

69978607 is a deficient number, since it is larger than the sum of its proper divisors (1).

69978607 is an equidigital number, since it uses as much as digits as its factorization.

69978607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1143072, while the sum is 52.

The square root of 69978607 is about 8365.3216913637. The cubic root of 69978607 is about 412.0865415810.

The spelling of 69978607 in words is "sixty-nine million, nine hundred seventy-eight thousand, six hundred seven".