739555421 has 4 divisors (see below), whose sum is σ = 806787744. Its totient is φ = 672323100.

The previous prime is 739555381. The next prime is 739555433. The reversal of 739555421 is 124555937.

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: 124555937 = 11 ⋅11323267.

It is a cyclic number.

It is not a de Polignac number, because 739555421 - 2⁶ = 739555357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (739555021) 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, 33616145 + ... + 33616166.

It is an arithmetic number, because the mean of its divisors is an integer number (201696936).

Almost surely, 2^739555421 is an apocalyptic number.

It is an amenable number.

739555421 is a deficient number, since it is larger than the sum of its proper divisors (67232323).

739555421 is a wasteful number, since it uses less digits than its factorization.

739555421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67232322.

The product of its digits is 189000, while the sum is 41.

The square root of 739555421 is about 27194.7682652381. The cubic root of 739555421 is about 904.3229966259.

The spelling of 739555421 in words is "seven hundred thirty-nine million, five hundred fifty-five thousand, four hundred twenty-one".