997061139 has 12 divisors (see below), whose sum is σ = 1440596872. Its totient is φ = 664524000.

The previous prime is 997061137. The next prime is 997061147. The reversal of 997061139 is 931160799.

It is not a de Polignac number, because 997061139 - 2¹ = 997061137 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 997061094 and 997061103.

It is not an unprimeable number, because it can be changed into a prime (997061137) 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, 24624 + ... + 50994.

Almost surely, 2^997061139 is an apocalyptic number.

997061139 is a deficient number, since it is larger than the sum of its proper divisors (443535733).

997061139 is a wasteful number, since it uses less digits than its factorization.

997061139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30578 (or 30575 counting only the distinct ones).

The product of its (nonzero) digits is 91854, while the sum is 45.

The square root of 997061139 is about 31576.2749386307. The cubic root of 997061139 is about 999.0194184408.

The spelling of 997061139 in words is "nine hundred ninety-seven million, sixty-one thousand, one hundred thirty-nine".