997653100 has 36 divisors (see below), whose sum is σ = 2167439400. Its totient is φ = 398594560.

The previous prime is 997653077. The next prime is 997653101. The reversal of 997653100 is 1356799.

It is a super-2 number, since 2×997653100² = 1990623415879220000, which contains 22 as substring.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (997653101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87531 + ... + 98269.

It is an arithmetic number, because the mean of its divisors is an integer number (60206650).

Almost surely, 2^997653100 is an apocalyptic number.

It is an amenable number.

997653100 is an abundant number, since it is smaller than the sum of its proper divisors (1169786300).

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

997653100 is a wasteful number, since it uses less digits than its factorization.

997653100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11682 (or 11675 counting only the distinct ones).

The product of its (nonzero) digits is 51030, while the sum is 40.

The square root of 997653100 is about 31585.6470568516. The cubic root of 997653100 is about 999.2170872075.

The spelling of 997653100 in words is "nine hundred ninety-seven million, six hundred fifty-three thousand, one hundred".