7139938477 has 16 divisors (see below), whose sum is σ = 8655517440. Its totient is φ = 5749555968.

The previous prime is 7139938469. The next prime is 7139938489. The reversal of 7139938477 is 7748399317.

It is a cyclic number.

It is not a de Polignac number, because 7139938477 - 2³ = 7139938469 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 (7139938577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12424 + ... + 120142.

It is an arithmetic number, because the mean of its divisors is an integer number (540969840).

Almost surely, 2^7139938477 is an apocalyptic number.

It is an amenable number.

7139938477 is a deficient number, since it is larger than the sum of its proper divisors (1515578963).

7139938477 is a wasteful number, since it uses less digits than its factorization.

7139938477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108300.

The product of its digits is 8001504, while the sum is 58.

The square root of 7139938477 is about 84498.1566485329. The cubic root of 7139938477 is about 1925.5944396375.

The spelling of 7139938477 in words is "seven billion, one hundred thirty-nine million, nine hundred thirty-eight thousand, four hundred seventy-seven".