69640783 has 2 divisors, whose sum is σ = 69640784. Its totient is φ = 69640782.

The previous prime is 69640763. The next prime is 69640817. The reversal of 69640783 is 38704696.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 69640783 - 2⁵ = 69640751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69640723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34820391 + 34820392.

It is an arithmetic number, because the mean of its divisors is an integer number (34820392).

Almost surely, 2^69640783 is an apocalyptic number.

69640783 is a deficient number, since it is larger than the sum of its proper divisors (1).

69640783 is an equidigital number, since it uses as much as digits as its factorization.

69640783 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 43.

The square root of 69640783 is about 8345.1053318697. The cubic root of 69640783 is about 411.4223512400.

The spelling of 69640783 in words is "sixty-nine million, six hundred forty thousand, seven hundred eighty-three".