620427154 has 4 divisors (see below), whose sum is σ = 930640734. Its totient is φ = 310213576.

The previous prime is 620427151. The next prime is 620427161. The reversal of 620427154 is 451724026.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 437771929 + 182655225 = 20923^2 + 13515^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (620427151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155106787 + ... + 155106790.

Almost surely, 2^620427154 is an apocalyptic number.

620427154 is a deficient number, since it is larger than the sum of its proper divisors (310213580).

620427154 is a wasteful number, since it uses less digits than its factorization.

620427154 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310213579.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 620427154 is about 24908.3751778393. The cubic root of 620427154 is about 852.8976786567.

It can be divided in two parts, 62042 and 7154, that added together give a palindrome (69196).

The spelling of 620427154 in words is "six hundred twenty million, four hundred twenty-seven thousand, one hundred fifty-four".