69401887 has 2 divisors, whose sum is σ = 69401888. Its totient is φ = 69401886.

The previous prime is 69401869. The next prime is 69401897. The reversal of 69401887 is 78810496.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69401887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69401867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34700943 + 34700944.

It is an arithmetic number, because the mean of its divisors is an integer number (34700944).

Almost surely, 2^69401887 is an apocalyptic number.

69401887 is a deficient number, since it is larger than the sum of its proper divisors (1).

69401887 is an equidigital number, since it uses as much as digits as its factorization.

69401887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 69401887 is about 8330.7794953414. The cubic root of 69401887 is about 410.9513640173.

It can be divided in two parts, 69 and 401887, that added together give a square (401956 = 634²).

The spelling of 69401887 in words is "sixty-nine million, four hundred one thousand, eight hundred eighty-seven".