1642969051 has 4 divisors (see below), whose sum is σ = 1714402512. Its totient is φ = 1571535592.

The previous prime is 1642969043. The next prime is 1642969061. The reversal of 1642969051 is 1509692461.

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

It is a cyclic number.

It is not a de Polignac number, because 1642969051 - 2³ = 1642969043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1642968989 and 1642969007.

It is not an unprimeable number, because it can be changed into a prime (1642969001) 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, 35716696 + ... + 35716741.

It is an arithmetic number, because the mean of its divisors is an integer number (428600628).

Almost surely, 2^1642969051 is an apocalyptic number.

1642969051 is a deficient number, since it is larger than the sum of its proper divisors (71433461).

1642969051 is an equidigital number, since it uses as much as digits as its factorization.

1642969051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71433460.

The product of its (nonzero) digits is 116640, while the sum is 43.

The square root of 1642969051 is about 40533.5546307007. The cubic root of 1642969051 is about 1179.9849301437.

The spelling of 1642969051 in words is "one billion, six hundred forty-two million, nine hundred sixty-nine thousand, fifty-one".