1011399499 has 4 divisors (see below), whose sum is σ = 1103344920. Its totient is φ = 919454080.

The previous prime is 1011399497. The next prime is 1011399509. The reversal of 1011399499 is 9949931101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9949931101 = 11 ⋅904539191.

It is a cyclic number.

It is not a de Polignac number, because 1011399499 - 2¹ = 1011399497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1011399491) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45972694 + ... + 45972715.

It is an arithmetic number, because the mean of its divisors is an integer number (275836230).

Almost surely, 2^1011399499 is an apocalyptic number.

1011399499 is a deficient number, since it is larger than the sum of its proper divisors (91945421).

1011399499 is an equidigital number, since it uses as much as digits as its factorization.

1011399499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91945420.

The product of its (nonzero) digits is 78732, while the sum is 46.

The square root of 1011399499 is about 31802.5077470315. The cubic root of 1011399499 is about 1003.7854850213.

The spelling of 1011399499 in words is "one billion, eleven million, three hundred ninety-nine thousand, four hundred ninety-nine".