997951051 has 8 divisors (see below), whose sum is σ = 1057084560. Its totient is φ = 938865408.

The previous prime is 997951049. The next prime is 997951061. The reversal of 997951051 is 150159799.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 997951051 - 2¹ = 997951049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 997950992 and 997951010.

It is not an unprimeable number, because it can be changed into a prime (997951001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36640 + ... + 57778.

It is an arithmetic number, because the mean of its divisors is an integer number (132135570).

Almost surely, 2^997951051 is an apocalyptic number.

997951051 is the 19980-th centered pentagonal number.

997951051 is a deficient number, since it is larger than the sum of its proper divisors (59133509).

997951051 is a wasteful number, since it uses less digits than its factorization.

997951051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23933.

The product of its (nonzero) digits is 127575, while the sum is 46.

The square root of 997951051 is about 31590.3632616024. The cubic root of 997951051 is about 999.3165500025.

The spelling of 997951051 in words is "nine hundred ninety-seven million, nine hundred fifty-one thousand, fifty-one".