69137993 has 2 divisors, whose sum is σ = 69137994. Its totient is φ = 69137992.

The previous prime is 69137983. The next prime is 69138053. The reversal of 69137993 is 39973196.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62599744 + 6538249 = 7912^2 + 2557^2 .

It is a cyclic number.

It is not a de Polignac number, because 69137993 - 2¹⁶ = 69072457 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (69137923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34568996 + 34568997.

It is an arithmetic number, because the mean of its divisors is an integer number (34568997).

Almost surely, 2^69137993 is an apocalyptic number.

It is an amenable number.

69137993 is a deficient number, since it is larger than the sum of its proper divisors (1).

69137993 is an equidigital number, since it uses as much as digits as its factorization.

69137993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 275562, while the sum is 47.

The square root of 69137993 is about 8314.9259166874. The cubic root of 69137993 is about 410.4298347578.

The spelling of 69137993 in words is "sixty-nine million, one hundred thirty-seven thousand, nine hundred ninety-three".