1098697505 has 16 divisors (see below), whose sum is σ = 1441027584. Its totient is φ = 800567040.

The previous prime is 1098697489. The next prime is 1098697517. The reversal of 1098697505 is 5057968901.

It is a happy number.

It is not a de Polignac number, because 1098697505 - 2⁴ = 1098697489 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205847 + ... + 211116.

It is an arithmetic number, because the mean of its divisors is an integer number (90064224).

Almost surely, 2^1098697505 is an apocalyptic number.

It is an amenable number.

1098697505 is a deficient number, since it is larger than the sum of its proper divisors (342330079).

1098697505 is a wasteful number, since it uses less digits than its factorization.

1098697505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417016.

The product of its (nonzero) digits is 680400, while the sum is 50.

The square root of 1098697505 is about 33146.6062365365. The cubic root of 1098697505 is about 1031.8725182679.

The spelling of 1098697505 in words is "one billion, ninety-eight million, six hundred ninety-seven thousand, five hundred five".