999923537 has 2 divisors, whose sum is σ = 999923538. Its totient is φ = 999923536.

The previous prime is 999923531. The next prime is 999923579. The reversal of 999923537 is 735329999.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 703257361 + 296666176 = 26519^2 + 17224^2 .

It is a cyclic number.

It is not a de Polignac number, because 999923537 - 2²² = 995729233 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (999923531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499961768 + 499961769.

It is an arithmetic number, because the mean of its divisors is an integer number (499961769).

Almost surely, 2^999923537 is an apocalyptic number.

It is an amenable number.

999923537 is a deficient number, since it is larger than the sum of its proper divisors (1).

999923537 is an equidigital number, since it uses as much as digits as its factorization.

999923537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4133430, while the sum is 56.

The square root of 999923537 is about 31621.5675923886. The cubic root of 999923537 is about 999.9745116837.

The spelling of 999923537 in words is "nine hundred ninety-nine million, nine hundred twenty-three thousand, five hundred thirty-seven".