1097999450 has 24 divisors (see below), whose sum is σ = 2112705180. Its totient is φ = 424054400.

The previous prime is 1097999377. The next prime is 1097999471. The reversal of 1097999450 is 549997901.

It can be written as a sum of positive squares in 6 ways, for example, as 200817241 + 897182209 = 14171^2 + 29953^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1097999392 and 1097999401.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 377171 + ... + 380070.

Almost surely, 2^1097999450 is an apocalyptic number.

1097999450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1097999450 is a deficient number, since it is larger than the sum of its proper divisors (1014705730).

1097999450 is a wasteful number, since it uses less digits than its factorization.

1097999450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757282 (or 757277 counting only the distinct ones).

The product of its (nonzero) digits is 918540, while the sum is 53.

The square root of 1097999450 is about 33136.0747524507. The cubic root of 1097999450 is about 1031.6539393387.

The spelling of 1097999450 in words is "one billion, ninety-seven million, nine hundred ninety-nine thousand, four hundred fifty".