997902529 has 4 divisors (see below), whose sum is σ = 1074664276. Its totient is φ = 921140784.

The previous prime is 997902517. The next prime is 997902539. The reversal of 997902529 is 925209799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 925209799 = 23 ⋅40226513.

It can be written as a sum of positive squares in 2 ways, for example, as 82719025 + 915183504 = 9095^2 + 30252^2 .

It is a cyclic number.

It is not a de Polignac number, because 997902529 - 2²⁹ = 461031617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (997902539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38380854 + ... + 38380879.

It is an arithmetic number, because the mean of its divisors is an integer number (268666069).

Almost surely, 2^997902529 is an apocalyptic number.

It is an amenable number.

997902529 is a deficient number, since it is larger than the sum of its proper divisors (76761747).

997902529 is a wasteful number, since it uses less digits than its factorization.

997902529 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76761746.

The product of its (nonzero) digits is 918540, while the sum is 52.

The square root of 997902529 is about 31589.5952648970. The cubic root of 997902529 is about 999.3003536091.

The spelling of 997902529 in words is "nine hundred ninety-seven million, nine hundred two thousand, five hundred twenty-nine".