1098815807 has 2 divisors, whose sum is σ = 1098815808. Its totient is φ = 1098815806.

The previous prime is 1098815803. The next prime is 1098815813. The reversal of 1098815807 is 7085188901.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1098815807 - 2² = 1098815803 is a prime.

It is a super-2 number, since 2×1098815807² = 2414792355426122498, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1098815803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 549407903 + 549407904.

It is an arithmetic number, because the mean of its divisors is an integer number (549407904).

Almost surely, 2^1098815807 is an apocalyptic number.

1098815807 is a deficient number, since it is larger than the sum of its proper divisors (1).

1098815807 is an equidigital number, since it uses as much as digits as its factorization.

1098815807 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 47.

The square root of 1098815807 is about 33148.3907150860. The cubic root of 1098815807 is about 1031.9095524837.

The spelling of 1098815807 in words is "one billion, ninety-eight million, eight hundred fifteen thousand, eight hundred seven".