739703921 has 4 divisors (see below), whose sum is σ = 806949744. Its totient is φ = 672458100.

The previous prime is 739703869. The next prime is 739703969. The reversal of 739703921 is 129307937.

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: 129307937 = 11 ⋅11755267.

It is a cyclic number.

It is not a de Polignac number, because 739703921 - 2¹⁸ = 739441777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (739703981) 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, 33622895 + ... + 33622916.

It is an arithmetic number, because the mean of its divisors is an integer number (201737436).

Almost surely, 2^739703921 is an apocalyptic number.

It is an amenable number.

739703921 is a deficient number, since it is larger than the sum of its proper divisors (67245823).

739703921 is a wasteful number, since it uses less digits than its factorization.

739703921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67245822.

The product of its (nonzero) digits is 71442, while the sum is 41.

The square root of 739703921 is about 27197.4984327603. The cubic root of 739703921 is about 904.3835208155.

The spelling of 739703921 in words is "seven hundred thirty-nine million, seven hundred three thousand, nine hundred twenty-one".