3620139 has 4 divisors (see below), whose sum is σ = 4826856. Its totient is φ = 2413424.

The previous prime is 3620129. The next prime is 3620153. The reversal of 3620139 is 9310263.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9310263 = 3 ⋅3103421.

It is a cyclic number.

It is not a de Polignac number, because 3620139 - 2⁷ = 3620011 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (3620119) 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, 603354 + ... + 603359.

It is an arithmetic number, because the mean of its divisors is an integer number (1206714).

Almost surely, 2^3620139 is an apocalyptic number.

3620139 is a deficient number, since it is larger than the sum of its proper divisors (1206717).

3620139 is a wasteful number, since it uses less digits than its factorization.

3620139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206716.

The product of its (nonzero) digits is 972, while the sum is 24.

The square root of 3620139 is about 1902.6662870824. Note that the first 3 decimals coincide. The cubic root of 3620139 is about 153.5471460538.

The spelling of 3620139 in words is "three million, six hundred twenty thousand, one hundred thirty-nine".