69697990 has 16 divisors (see below), whose sum is σ = 127514160. Its totient is φ = 27421920.

The previous prime is 69697949. The next prime is 69697997. The reversal of 69697990 is 9979696.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (69697997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56520 + ... + 57739.

It is an arithmetic number, because the mean of its divisors is an integer number (7969635).

Almost surely, 2^69697990 is an apocalyptic number.

69697990 is a deficient number, since it is larger than the sum of its proper divisors (57816170).

69697990 is a wasteful number, since it uses less digits than its factorization.

69697990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114327.

The product of its (nonzero) digits is 1653372, while the sum is 55.

The square root of 69697990 is about 8348.5322063223. The cubic root of 69697990 is about 411.5349758434.

The spelling of 69697990 in words is "sixty-nine million, six hundred ninety-seven thousand, nine hundred ninety".