1642769953 has 4 divisors (see below), whose sum is σ = 1792112688. Its totient is φ = 1493427220.

The previous prime is 1642769941. The next prime is 1642769983. The reversal of 1642769953 is 3599672461.

It is a happy number.

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 1642769953 - 2¹³ = 1642761761 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 1642769953.

It is not an unprimeable number, because it can be changed into a prime (1642769903) 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, 74671351 + ... + 74671372.

It is an arithmetic number, because the mean of its divisors is an integer number (448028172).

Almost surely, 2^1642769953 is an apocalyptic number.

It is an amenable number.

1642769953 is a deficient number, since it is larger than the sum of its proper divisors (149342735).

1642769953 is a wasteful number, since it uses less digits than its factorization.

1642769953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149342734.

The product of its digits is 2449440, while the sum is 52.

The square root of 1642769953 is about 40531.0985910819. The cubic root of 1642769953 is about 1179.9372639729.

The spelling of 1642769953 in words is "one billion, six hundred forty-two million, seven hundred sixty-nine thousand, nine hundred fifty-three".