721475374 has 4 divisors (see below), whose sum is σ = 1082213064. Its totient is φ = 360737686.

The previous prime is 721475357. The next prime is 721475383. The reversal of 721475374 is 473574127.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 473574127 = 13 ⋅36428779.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180368842 + ... + 180368845.

It is an arithmetic number, because the mean of its divisors is an integer number (270553266).

Almost surely, 2^721475374 is an apocalyptic number.

721475374 is a deficient number, since it is larger than the sum of its proper divisors (360737690).

721475374 is a wasteful number, since it uses less digits than its factorization.

721475374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360737689.

The product of its digits is 164640, while the sum is 40.

The square root of 721475374 is about 26860.2936320510. The cubic root of 721475374 is about 896.8927305215.

The spelling of 721475374 in words is "seven hundred twenty-one million, four hundred seventy-five thousand, three hundred seventy-four".