69742919 has 2 divisors, whose sum is σ = 69742920. Its totient is φ = 69742918.

The previous prime is 69742909. The next prime is 69742931. The reversal of 69742919 is 91924796.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-69742919 is a prime.

It is a super-2 number, since 2×69742919² = 9728149501281122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (69742909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34871459 + 34871460.

It is an arithmetic number, because the mean of its divisors is an integer number (34871460).

Almost surely, 2^69742919 is an apocalyptic number.

69742919 is a deficient number, since it is larger than the sum of its proper divisors (1).

69742919 is an equidigital number, since it uses as much as digits as its factorization.

69742919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 47.

The square root of 69742919 is about 8351.2226051040. Note that the first 3 decimals coincide. The cubic root of 69742919 is about 411.6233852956.

The spelling of 69742919 in words is "sixty-nine million, seven hundred forty-two thousand, nine hundred nineteen".