997752156 has 12 divisors (see below), whose sum is σ = 2328088392. Its totient is φ = 332584048.

The previous prime is 997752139. The next prime is 997752157. The reversal of 997752156 is 651257799.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 997752099 and 997752108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (997752157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41572995 + ... + 41573018.

It is an arithmetic number, because the mean of its divisors is an integer number (194007366).

Almost surely, 2^997752156 is an apocalyptic number.

It is an amenable number.

997752156 is an abundant number, since it is smaller than the sum of its proper divisors (1330336236).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

997752156 is a wasteful number, since it uses less digits than its factorization.

997752156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83146020 (or 83146018 counting only the distinct ones).

The product of its digits is 1190700, while the sum is 51.

The square root of 997752156 is about 31587.2150719243. The cubic root of 997752156 is about 999.2501565420.

The spelling of 997752156 in words is "nine hundred ninety-seven million, seven hundred fifty-two thousand, one hundred fifty-six".