1479339721 has 2 divisors, whose sum is σ = 1479339722. Its totient is φ = 1479339720.

The previous prime is 1479339703. The next prime is 1479339727. The reversal of 1479339721 is 1279339741.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1079779600 + 399560121 = 32860^2 + 19989^2 .

It is a cyclic number.

It is not a de Polignac number, because 1479339721 - 2⁵ = 1479339689 is a prime.

It is not a weakly prime, because it can be changed into another prime (1479339727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 739669860 + 739669861.

It is an arithmetic number, because the mean of its divisors is an integer number (739669861).

Almost surely, 2^1479339721 is an apocalyptic number.

It is an amenable number.

1479339721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1479339721 is an equidigital number, since it uses as much as digits as its factorization.

1479339721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 46.

The square root of 1479339721 is about 38462.1855983250. The cubic root of 1479339721 is about 1139.4343456708.

It can be divided in two parts, 1479339 and 721, that added together give a triangular number (1480060 = T₁₇₂₀).

The spelling of 1479339721 in words is "one billion, four hundred seventy-nine million, three hundred thirty-nine thousand, seven hundred twenty-one".