39400797 has 4 divisors (see below), whose sum is σ = 52534400. Its totient is φ = 26267196.

The previous prime is 39400793. The next prime is 39400799. The reversal of 39400797 is 79700493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 39400797 - 2² = 39400793 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 (39400793) 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, 6566797 + ... + 6566802.

It is an arithmetic number, because the mean of its divisors is an integer number (13133600).

Almost surely, 2^39400797 is an apocalyptic number.

It is an amenable number.

39400797 is a deficient number, since it is larger than the sum of its proper divisors (13133603).

39400797 is a wasteful number, since it uses less digits than its factorization.

39400797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13133602.

The product of its (nonzero) digits is 47628, while the sum is 39.

The square root of 39400797 is about 6277.0054165979. The cubic root of 39400797 is about 340.2788859440.

The spelling of 39400797 in words is "thirty-nine million, four hundred thousand, seven hundred ninety-seven".