39700421 has 4 divisors (see below), whose sum is σ = 39741792. Its totient is φ = 39659052.

The previous prime is 39700411. The next prime is 39700439. The reversal of 39700421 is 12400793.

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 a cyclic number.

It is not a de Polignac number, because 39700421 - 2⁶ = 39700357 is a prime.

It is a super-2 number, since 2×39700421² = 3152246855154482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39700411) 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, 19211 + ... + 21176.

It is an arithmetic number, because the mean of its divisors is an integer number (9935448).

Almost surely, 2^39700421 is an apocalyptic number.

It is an amenable number.

39700421 is a deficient number, since it is larger than the sum of its proper divisors (41371).

39700421 is an equidigital number, since it uses as much as digits as its factorization.

39700421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41370.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 39700421 is about 6300.8270092108. The cubic root of 39700421 is about 341.1392608069.

The spelling of 39700421 in words is "thirty-nine million, seven hundred thousand, four hundred twenty-one".