783724121421 has 8 divisors (see below), whose sum is σ = 1058192906880. Its totient is φ = 515869041792.

The previous prime is 783724121357. The next prime is 783724121461. The reversal of 783724121421 is 124121427387.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 783724121421 - 2⁶ = 783724121357 is a prime.

It is a super-2 number, since 2×783724121421² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (783724121461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1653426180 + ... + 1653426653.

It is an arithmetic number, because the mean of its divisors is an integer number (132274113360).

Almost surely, 2^783724121421 is an apocalyptic number.

It is an amenable number.

783724121421 is a deficient number, since it is larger than the sum of its proper divisors (274468785459).

783724121421 is a wasteful number, since it uses less digits than its factorization.

783724121421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3306852915.

The product of its digits is 150528, while the sum is 42.

The spelling of 783724121421 in words is "seven hundred eighty-three billion, seven hundred twenty-four million, one hundred twenty-one thousand, four hundred twenty-one".