621470061 has 6 divisors (see below), whose sum is σ = 897678990. Its totient is φ = 414313368.

The previous prime is 621470041. The next prime is 621470063. The reversal of 621470061 is 160074126.

It can be written as a sum of positive squares in only one way, i.e., 585398025 + 36072036 = 24195^2 + 6006^2 .

It is not a de Polignac number, because 621470061 - 2¹⁵ = 621437293 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (621470063) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 34526106 + ... + 34526123.

It is an arithmetic number, because the mean of its divisors is an integer number (149613165).

Almost surely, 2^621470061 is an apocalyptic number.

It is an amenable number.

621470061 is a deficient number, since it is larger than the sum of its proper divisors (276208929).

621470061 is a wasteful number, since it uses less digits than its factorization.

621470061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69052235 (or 69052232 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 621470061 is about 24929.3012537456. The cubic root of 621470061 is about 853.3753039083.

The spelling of 621470061 in words is "six hundred twenty-one million, four hundred seventy thousand, sixty-one".