621954949 has 16 divisors (see below), whose sum is σ = 816238080. Its totient is φ = 459131760.

The previous prime is 621954943. The next prime is 621954961. The reversal of 621954949 is 949459126.

It is a cyclic number.

It is not a de Polignac number, because 621954949 - 2⁷ = 621954821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621954943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211099 + ... + 214024.

It is an arithmetic number, because the mean of its divisors is an integer number (51014880).

Almost surely, 2^621954949 is an apocalyptic number.

It is an amenable number.

621954949 is a deficient number, since it is larger than the sum of its proper divisors (194283131).

621954949 is a wasteful number, since it uses less digits than its factorization.

621954949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425160.

The product of its digits is 699840, while the sum is 49.

The square root of 621954949 is about 24939.0246200608. The cubic root of 621954949 is about 853.5971884901.

The spelling of 621954949 in words is "six hundred twenty-one million, nine hundred fifty-four thousand, nine hundred forty-nine".