1499375779 has 16 divisors (see below), whose sum is σ = 1651777920. Its totient is φ = 1349724160.

The previous prime is 1499375771. The next prime is 1499375803. The reversal of 1499375779 is 9775739941.

It is a cyclic number.

It is not a de Polignac number, because 1499375779 - 2³ = 1499375771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1499375771) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 504552 + ... + 507514.

It is an arithmetic number, because the mean of its divisors is an integer number (103236120).

Almost surely, 2^1499375779 is an apocalyptic number.

1499375779 is a deficient number, since it is larger than the sum of its proper divisors (152402141).

1499375779 is a wasteful number, since it uses less digits than its factorization.

1499375779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410.

The product of its digits is 15002820, while the sum is 61.

The square root of 1499375779 is about 38721.7739650445. The cubic root of 1499375779 is about 1144.5554305951. Note that the first 3 decimals are identical.

The spelling of 1499375779 in words is "one billion, four hundred ninety-nine million, three hundred seventy-five thousand, seven hundred seventy-nine".