39729154 has 4 divisors (see below), whose sum is σ = 59593734. Its totient is φ = 19864576.

The previous prime is 39729127. The next prime is 39729169. The reversal of 39729154 is 45192793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45192793 = 853 ⋅52981.

It can be written as a sum of positive squares in only one way, i.e., 26574025 + 13155129 = 5155^2 + 3627^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9932287 + ... + 9932290.

Almost surely, 2^39729154 is an apocalyptic number.

39729154 is a deficient number, since it is larger than the sum of its proper divisors (19864580).

39729154 is a wasteful number, since it uses less digits than its factorization.

39729154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19864579.

The product of its digits is 68040, while the sum is 40.

The square root of 39729154 is about 6303.1066943215. The cubic root of 39729154 is about 341.2215402923.

The spelling of 39729154 in words is "thirty-nine million, seven hundred twenty-nine thousand, one hundred fifty-four".