997778134 has 16 divisors (see below), whose sum is σ = 1594971648. Its totient is φ = 467044072.

The previous prime is 997778129. The next prime is 997778143. The reversal of 997778134 is 431877799.

It is a super-4 number, since 4×997778134⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228592 + ... + 232915.

It is an arithmetic number, because the mean of its divisors is an integer number (99685728).

Almost surely, 2^997778134 is an apocalyptic number.

997778134 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

997778134 is a deficient number, since it is larger than the sum of its proper divisors (597193514).

997778134 is a wasteful number, since it uses less digits than its factorization.

997778134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 461579.

The product of its digits is 2667168, while the sum is 55.

The square root of 997778134 is about 31587.6262799217. The cubic root of 997778134 is about 999.2588288010.

The spelling of 997778134 in words is "nine hundred ninety-seven million, seven hundred seventy-eight thousand, one hundred thirty-four".