156420377 has 2 divisors, whose sum is σ = 156420378. Its totient is φ = 156420376.

The previous prime is 156420373. The next prime is 156420379. The reversal of 156420377 is 773024651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 102191881 + 54228496 = 10109^2 + 7364^2 .

It is a cyclic number.

It is not a de Polignac number, because 156420377 - 2² = 156420373 is a prime.

Together with 156420379, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (156420373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78210188 + 78210189.

It is an arithmetic number, because the mean of its divisors is an integer number (78210189).

Almost surely, 2^156420377 is an apocalyptic number.

It is an amenable number.

156420377 is a deficient number, since it is larger than the sum of its proper divisors (1).

156420377 is an equidigital number, since it uses as much as digits as its factorization.

156420377 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 156420377 is about 12506.8132231996. The cubic root of 156420377 is about 538.8043699917.

The spelling of 156420377 in words is "one hundred fifty-six million, four hundred twenty thousand, three hundred seventy-seven".