1497779450 has 24 divisors (see below), whose sum is σ = 2786926908. Its totient is φ = 598884480.

The previous prime is 1497779449. The next prime is 1497779467. The reversal of 1497779450 is 549777941.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 325333369 + 1172446081 = 18037^2 + 34241^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1497779392 and 1497779401.

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, 204044 + ... + 211256.

Almost surely, 2^1497779450 is an apocalyptic number.

1497779450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1497779450 is a deficient number, since it is larger than the sum of its proper divisors (1289147458).

1497779450 is a wasteful number, since it uses less digits than its factorization.

1497779450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11378 (or 11373 counting only the distinct ones).

The product of its (nonzero) digits is 2222640, while the sum is 53.

The square root of 1497779450 is about 38701.1556674991. The cubic root of 1497779450 is about 1144.1490979853.

The spelling of 1497779450 in words is "one billion, four hundred ninety-seven million, seven hundred seventy-nine thousand, four hundred fifty".