377951989 has 2 divisors, whose sum is σ = 377951990. Its totient is φ = 377951988.

The previous prime is 377951953. The next prime is 377952013. The reversal of 377951989 is 989159773.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 367028964 + 10923025 = 19158^2 + 3305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-377951989 is a prime.

It is a super-2 number, since 2×377951989² = 285695411978112242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (377951689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 188975994 + 188975995.

It is an arithmetic number, because the mean of its divisors is an integer number (188975995).

Almost surely, 2^377951989 is an apocalyptic number.

It is an amenable number.

377951989 is a deficient number, since it is larger than the sum of its proper divisors (1).

377951989 is an equidigital number, since it uses as much as digits as its factorization.

377951989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4286520, while the sum is 58.

The square root of 377951989 is about 19440.9873463258. The cubic root of 377951989 is about 723.0120659617.

The spelling of 377951989 in words is "three hundred seventy-seven million, nine hundred fifty-one thousand, nine hundred eighty-nine".