1949355097 has 4 divisors (see below), whose sum is σ = 1949444836. Its totient is φ = 1949265360.

The previous prime is 1949355049. The next prime is 1949355119. The reversal of 1949355097 is 7905539491.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 7905539491 = 2657 ⋅2975363.

It can be written as a sum of positive squares in 2 ways, for example, as 1521858121 + 427496976 = 39011^2 + 20676^2 .

It is a cyclic number.

It is not a de Polignac number, because 1949355097 - 2¹⁵ = 1949322329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1949355497) 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, 10447 + ... + 63307.

It is an arithmetic number, because the mean of its divisors is an integer number (487361209).

Almost surely, 2^1949355097 is an apocalyptic number.

It is an amenable number.

1949355097 is a deficient number, since it is larger than the sum of its proper divisors (89739).

1949355097 is an equidigital number, since it uses as much as digits as its factorization.

1949355097 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89738.

The product of its (nonzero) digits is 1530900, while the sum is 52.

The square root of 1949355097 is about 44151.5016392421. The cubic root of 1949355097 is about 1249.1952360218.

The spelling of 1949355097 in words is "one billion, nine hundred forty-nine million, three hundred fifty-five thousand, ninety-seven".