620638525 has 48 divisors (see below), whose sum is σ = 867944448. Its totient is φ = 437184000.

The previous prime is 620638519. The next prime is 620638531. The reversal of 620638525 is 525836026.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (620638519) and next prime (620638531).

It is not a de Polignac number, because 620638525 - 2¹³ = 620630333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 625780 + ... + 626770.

It is an arithmetic number, because the mean of its divisors is an integer number (18082176).

Almost surely, 2^620638525 is an apocalyptic number.

620638525 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

620638525 is a deficient number, since it is larger than the sum of its proper divisors (247305923).

620638525 is a wasteful number, since it uses less digits than its factorization.

620638525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1102 (or 1097 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 620638525 is about 24912.6177869769. The cubic root of 620638525 is about 852.9945244966.

The spelling of 620638525 in words is "six hundred twenty million, six hundred thirty-eight thousand, five hundred twenty-five".