1469138249 has 4 divisors (see below), whose sum is σ = 1555558164. Its totient is φ = 1382718336.

The previous prime is 1469138239. The next prime is 1469138287. The reversal of 1469138249 is 9428319641.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1281640000 + 187498249 = 35800^2 + 13693^2 .

It is a cyclic number.

It is not a de Polignac number, because 1469138249 - 2¹² = 1469134153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1469138239) 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, 43209932 + ... + 43209965.

It is an arithmetic number, because the mean of its divisors is an integer number (388889541).

Almost surely, 2^1469138249 is an apocalyptic number.

It is an amenable number.

1469138249 is a deficient number, since it is larger than the sum of its proper divisors (86419915).

1469138249 is an equidigital number, since it uses as much as digits as its factorization.

1469138249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86419914.

The product of its digits is 373248, while the sum is 47.

The square root of 1469138249 is about 38329.3392716337. The cubic root of 1469138249 is about 1136.8091362411.

The spelling of 1469138249 in words is "one billion, four hundred sixty-nine million, one hundred thirty-eight thousand, two hundred forty-nine".