1903498949 has 4 divisors (see below), whose sum is σ = 2076544320. Its totient is φ = 1730453580.

The previous prime is 1903498939. The next prime is 1903498951. The reversal of 1903498949 is 9498943091.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9498943091 = 11 ⋅863540281.

It is a cyclic number.

It is not a de Polignac number, because 1903498949 - 2⁸ = 1903498693 is a prime.

It is a super-3 number, since 3×1903498949³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1903498894 and 1903498903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1903498939) 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, 86522669 + ... + 86522690.

It is an arithmetic number, because the mean of its divisors is an integer number (519136080).

Almost surely, 2^1903498949 is an apocalyptic number.

It is an amenable number.

1903498949 is a deficient number, since it is larger than the sum of its proper divisors (173045371).

1903498949 is a wasteful number, since it uses less digits than its factorization.

1903498949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173045370.

The product of its (nonzero) digits is 2519424, while the sum is 56.

The square root of 1903498949 is about 43629.1066720372. The cubic root of 1903498949 is about 1239.3221557563.

The spelling of 1903498949 in words is "one billion, nine hundred three million, four hundred ninety-eight thousand, nine hundred forty-nine".