1902949693 has 4 divisors (see below), whose sum is σ = 2003104960. Its totient is φ = 1802794428.

The previous prime is 1902949691. The next prime is 1902949721. The reversal of 1902949693 is 3969492091.

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.

It is a cyclic number.

It is not a de Polignac number, because 1902949693 - 2¹ = 1902949691 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1902949693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1902949691) 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, 50077605 + ... + 50077642.

It is an arithmetic number, because the mean of its divisors is an integer number (500776240).

Almost surely, 2^1902949693 is an apocalyptic number.

It is an amenable number.

1902949693 is a deficient number, since it is larger than the sum of its proper divisors (100155267).

1902949693 is a wasteful number, since it uses less digits than its factorization.

1902949693 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100155266.

The product of its (nonzero) digits is 944784, while the sum is 52.

The square root of 1902949693 is about 43622.8116127331. The cubic root of 1902949693 is about 1239.2029418540.

The spelling of 1902949693 in words is "one billion, nine hundred two million, nine hundred forty-nine thousand, six hundred ninety-three".