39400061 has 4 divisors (see below), whose sum is σ = 39461052. Its totient is φ = 39339072.

The previous prime is 39400021. The next prime is 39400063. The reversal of 39400061 is 16000493.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16000493 = 2789 ⋅5737.

It can be written as a sum of positive squares in 2 ways, for example, as 6280036 + 33120025 = 2506^2 + 5755^2 .

It is a cyclic number.

It is not a de Polignac number, because 39400061 - 2¹⁴ = 39383677 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 (39400063) 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, 29516 + ... + 30821.

It is an arithmetic number, because the mean of its divisors is an integer number (9865263).

Almost surely, 2^39400061 is an apocalyptic number.

It is an amenable number.

39400061 is a deficient number, since it is larger than the sum of its proper divisors (60991).

39400061 is an equidigital number, since it uses as much as digits as its factorization.

39400061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60990.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 39400061 is about 6276.9467896422. The cubic root of 39400061 is about 340.2767671475.

The spelling of 39400061 in words is "thirty-nine million, four hundred thousand, sixty-one".